A black cat sneaked into the wedding reception of young master Tadayuki and jumped onto a table, letting out an eerie cry. The commotion caused his grandfather, the chairman Koroku, to die of shock, followed by the sudden death of Koroku's second son, and misfortunes continued to plague the Otonosumi family. The resentment of the Jishoin family, who had their ceramics company taken over by the Otonosumi family, still lingers, and it is said that they have imbued the black cat with a curse of revenge. Are the series of tragedies the work of the mysterious cat?