An erotic suspense film about a female private investigator specializing in undercover sting operations who becomes entangled in a series of increasingly compromising situations. Yuki has graduated from junior college, but with no job prospects and having just been dumped by her boyfriend, she finds herself at a dead end. By chance, she meets Shimura, the owner of a private investigation agency that specializes in uncovering cases of infidelity and extramarital affairs.