Mercy is a notorious assassin calling herself an artist who creates art pieces with death and each murder has a peculiarity, she makes them based on themes, calling these “artistic performances.” A detective investigating the case swears to catch her and gradually, an obsession grows between the two. On one hand, the detective is determined to make her pay her crimes, while on the other, Mercy loves provoking the detective, constantly showing how she is always many steps ahead of the police.