「無限斜楝」三人組, 迎接第一個委託, 趙太太上門要求找回女兒趙小燕。本來, 眾人以為這是普通尋人委託, 但是趙太太卻說, 女兒其實就在家中, 只不過她認為那個並不是她的真正女兒?
The unsuspecting trio goes to a client's house to help investigate a case. But little do they know that the client's daughter is an acquaintance of Ka Hei. With two different versions of the story, everyone is deeply skeptical about the whole case. But Ka Hei is determined to investigate and get to the bottom of things.
