The next morning, Ren tells his uncle that his father's rival, tianxing, has returned to the city and wants to kill Ren's father. Ren tells him that he knows about yanxing's involvement in the assassination of his father, and Ren promises to help him. Ren asks his uncle if he has something to do that night, and the uncle says that he has nothing to do. He tells Ren that there is a lot of surveillance going on around the house, and that he should stay away from it. Ren wants a permanent shadow catching array, but Ren refuses to give him a choice between the disposable one and the permanent one. He wants Ren to be the first one to know who is coming, and he wants to be able to show up in the surveillance room before they arrive.