The children, however, were accustomed to the freedom of immense gardens and a plethora of playmates. In the summer palace, though, room was at a premium and young companions were a rarity. The few children who did live in the court had been forbidden from socializing with "the deserter's progeny." For Ji and Yo, the summer palace had become even more of a jail than it was for Wu.

The one island in this sea of isolation had been the Minister of State, Ju-Hai Chou. Wu suspected that the minister had guessed something of her husband's plan. Several times, he had called to reassure her that Batu had the emperor's complete confidence, no matter what the sycophants whispered. Ju-Hai had also gone out of his way to see that Wu lacked no luxury. He had even convinced the bureaucracy to let Wu and the children use the Celestial Garden.

Of all the things Ju-Hai had done, Wu appreciated this last favor the most. Located in the northwest corner of the palace, the garden was a small retreat no more than two hundred feet on a side. It was a feral place filled with trees of many varieties: plum, small magnolias, white mulberries. There were even two grand willows that, with their puff-ball shapes and weeping leaves, made the garden seem almost as wild and as marvelous as the parks of Chukei.

From Wu's perspective, however, the best thing about the Celestial Garden was its walls. The ones on the north and east were actually part of the palace fortifications and stood more than thirty feet tall. On the south and west, the walls were twenty feet tall. The garden had only one entrance, the circular "moon gate" on the south wall, before which Wu now stood. Normally, Wu was not such a student of architecture, but the high garden walls meant that she and her children could be alone—providing, of course, the guards did not find any spies or assassins lurking inside.

Wu and her children waited several minutes more before the two guards returned and stepped through the round gate. One wore green lamellar plate and the other an identical set of armor, save that it was blue. The one in green bowed, saying, "The Celestial Garden is vacant, Lady Batu. It is safe to enter."

Wu returned the guard's bow. "The minister shall hear of your vigilance."

As Wu and the children stepped through the gate, her guards snapped to attention and two brief, distinct clatters sounded behind her. There were two clatters because she had two sets of guards under separate commanders and they never did anything together. The ten soldiers in blue came from the Ministry of War. Her husband's enemy, Kwan Chan Sen, had assigned them to watch her at all times. The ten guards in green came from the Ministry of State Security. As a favor to Ju-Hai, Ting Mei Wan had assigned these guards to Wu. The duty of Ting's guards, as far as Wu could tell, was to protect her and the children from Kwan's men.

Neither group made Wu feel secure. She would rather have had a company of her husband's or father's personal guard, but the Grand Master of Protocol had made it clear that he would not permit such troops inside the palace. Wu was left feeling that she could trust only her own skills for the safety of her children and herself.

As she passed through the gate, Wu released the hands of her children. Both bolted for the northwest side of the garden, pausing on their way to roll down a manmade hill and splash through an artificial brook. Wu started to caution them about soiling their clothes, but decided to allow them their fun. With all that Shou Lung was asking of her family, the emperor could give her children new samfus if necessary.

In the growing shadows of dusk, Wu could almost forget that she was locked inside the palace. The center of the garden held a fish pond, upon which floated a miniature sampan large enough for two people. Though the pond was so small that one could walk around it in less than one hundred steps, a marble bridge spanned its center.

Beyond the pond, the Virtuous Consort's gardeners had formed the terrain into a series of serpentine hills, complete with artificial brooks and miniature cliffs. Along the walls, the trees and shrubbery grew so thick that the stonework behind them was completely hidden, giving the garden the appearance of being an open meadow in a forest. The two weeping willows completed the little park, towering high above the outer wall and draping their shaggy branches upon its crown.

Ji and Yo stopped at the willow closest to the west wall. Ji tugged at his sister's arm and circled the trunk. Yo followed, and they began a merry game of tag, dodging in and out among the long pendant leaves that drooped nearly to the ground. Both giggled wildly and yelled each other's names at the tops of their lungs. Wu did not remind them to keep their voices down. In the Celestial Garden, they could scream as loudly as they wished, for no one could hear them over the high walls.

Suddenly, both children stopped running and peered into the branches.

"What do you see?" Wu called, starting toward the garden corner. "Is it an owl?"

Ji studied the tree thoughtfully, then finally shook his head. "It's too big," he said.

"Well, then," Wu said, stepping across a brook. "It must be a tree troll—"

The pop of a breaking stick came from the willow, then one of its sagging branches rustled.

"It's a man!" Yo screamed, pointing overhead.

Wu broke into a sprint. "Children, get away from there!"

The urgency in her voice stunned the children into inaction. They looked at her with distressed expressions, then both began to cry.

Wu arrived beneath the tree a moment later. Ignoring her children's frightened tears, she shoved them behind her. Automatically, she assumed the stance of the golden crane, her arms raised over her head in a defensive position.

Wu could see a man's silhouette stretched out on a branch, trying to hide in the shadows. He appeared tall and fairly thin, but she could tell little more. The figure wore a black samfu, along with a black scarf to camouflage his face.

Wu could think of only one reason he would be in the garden. He was waiting to assassinate her or the Virtuous Consort. In either case, she thought it wisest not to let him escape. Besides, if she captured an assassin, some of the tongues denigrating her husband might be silenced.

In her most commanding voice, she said, "Ji, stop crying and listen to me!"

As she knew he would, her son obeyed immediately.

"This is very important," she continued, not taking her eyes off the figure in the tree. He would hear her instructions, but that could not be helped, "Take your sister and fetch the guards. Tell them to hurry because your mother is in danger. Do you understand?"

"Yes, Mother," he replied.

"Do it right now!" she said. "Run as fast as the wind!"

Ji took his sister's hand, and they sped off toward the gate. Wu continued to watch the silhouette.

As the children crossed the brook, the shadow glanced in their direction. It crawled along the limb toward the western wall. Wu realized that this was no vagabond, for an assassin's first instinct would have been to kill, not to run. The figure had been using the willow trees to climb over the outer wall in secrecy.

It could only be a Tuigan spy, Wu decided quickly.

Almost instantly, she leaped up and grabbed the willow's lowest branch. After the capture of the first infiltrator, the Minister of State Security had instituted stringent security measures to prevent more spies from entering or leaving the summer palace. The guard on the outer wall had been doubled, and even mandarins were thoroughly searched when they entered or left the palace.

Wu suspected that the spy had something important to relay to the barbarians if he was willing to brave the increased security. As far as she was concerned, that information could only decrease Batu's chances of returning alive. She had to capture the infiltrator.