Lupin and Jigen travel to a city where legend has it that an angel lives in the highest room of the round tower in the city. Lupin launches himself from a cannon and enters the room where he finds a young girl named Aurora and he takes her with him. She eventually proves to be a great annoyance, and despite Lupin's and Jigen's efforts they can't get her to leave. And when certain people notice that she is missing, Lupin may have taken more than he had bargained for.