In 195x, a man is murdered in the Sunset 19th Street apartment in the United States. The prime suspect is the victim's lover, 'Leon'. It is an 'obvious' case where all circumstances point to him as the culprit. Detective 'Benjamin', who has never taken on a murder case due to trauma, is offered to return to the Sunset 19th Street murder case, but tries to refuse. Then, the suspect Leon comes to Benjamin and makes him an offer he can't refuse, asking him to prove his innocence...

"You just brought me to your bedroom." "I like to break common sense."