Gai, a private detective, and his partner Kiko, a young girl, are hired by the widow of a cosmetics company executive to search for her lost black cat. They cross paths with Hei, who is on the search of the Contractor killing employees from the very same company. As the two groups continue to peruse in their search, Gai unexpectedly comes across the skeleton of a long dead woman. In the meantime, Hei discovers that the Contractor killing off the employees has the ability to switch bodies.