Her husband's company goes bankrupt. Izumi (Kawagoe) asks her best friend from college, Ayaka (Fukada), the daughter of a wealthy man, for financial help, but is turned down by Ayaka's father and Izumi is sold to a secret club. Having experienced hell on earth, Izumi decides to take revenge on Ayaka. While working as a servant in Ayaka's house, she waits for the right opportunity to take revenge. Ayaka, unaware of this...