She, a top-level killer at the Killer Employment Center is unexpectedly sent by her aunt to the bed of the big boss of Night Empire and got pregnant! When she wants to ask about the babys father, her aunt flees away…Six years later, when she, taking the child, turns every stone to find her aunt, she gets accidentally involved in a gangster dispute. The child is taken away by people with Night Empire. In desperation, she has to disguise as a male driver and undercover around the big boss…