Five Little Tabby Cats

On the way home from school, Xixi and Pippi found a skinny black cat that was so hungry that its heart was on its back. Pippi asserted: "Sister! This cat's eyes are different! It's like something from a spy movie!" Xixi wanted to feed her and leave, but the black cat gracefully (although her legs were a bit weak) wrapped her tail around Xixi's ankles, and used a way that they could "brain wave reception" (actually Xiao Hei's temporarily restored agent ability) to convey a word: "Save!" (Zheng's setting: it is easier for children to receive cat brain waves!). The two sisters instantly imagined a drama about "protecting an agent in distress"! Xixi decided: "Bring it with you! The code name is 'Shadow Claw'! The operation code name is 'Backyard Fortress'!" The goal of the operation is to hide the secret agent Xiao Hei in the rag-filled utility room in the yard on the first floor of his house!