A young detective is offered a case (by her old guardian) about her father's murder from when she was a child. To find the murderer, she goes undercover and works at the legal business for a mafia boss. They later find out that they have fallen for one another. However, her roommate goes missing. They, his brothers and some other members rescue her but a secret was revealed. How will he react when he finds out the truth? Will he help her? Or will he silence her?