We see weapons stolen from the opening minutes, and it catches our attention. The stolen truck with the dangerous weapons evades the police and acts as the film catalyst. Hence, a Chinese trainee agent called Yoo Da-hee is sent on a deadly and possibly fatal mission to recover the stolen guns. The intelligence agency that sends her also makes the audience aware that Korea will look bad if she dies in their country.
Yoo Da-hee’s boss decides to help her out by connecting him to an elite secret agent. However, this agent gets hit by a bus, and since he has no documents on him, none can identify him. So, she ends up mistaking a private detective called Woo Su-han as her contact. Their personalities are very different because she’s serious but, he’s more carefree and deeply motivated by money. Hence, they’re highly suspicious of each other and, they’ll exit the working arrangement immediately if it’s not beneficial for them.
During the tango dance scene, Yoo Da-hee & Woo Su-han coordinate well to retrieve a suspect’s phone and attempt to steal personal information crucial for the investigation. They seem to have a bit of chemistry, but it’s still shaky. Unfortunately, this suspect is poisoned and dies. Plus, both characters raise suspicion on themselves, which jeopardizes the investigation later on.
During the orphans’ dinner, they start trusting each other more as, shown in the action sequence against the bad guys in the kitchen. The bad guys order the private detective to kill the cops to save his life. However, he decides to kill the bad guys instead and save Yoo Da-hee from danger. We glimpse his past life that involved being in the military. We can tell that he deeply cares for her even though she’s not a Korean intelligence operative.