A mild-mannered professor moonlighting as a fake hit man in police stings ignites a chain reaction of trouble when he falls for a potential client.

Outcast by his co-workers and living alone, Koistinen is a security guard who works the night shift in a luxury shopping mall in Helsinki. But when icy blonde Mirja approaches him, the lonely Koistinen falls helplessly for her, unaware she is manipulating him for her criminal boyfriend.

All unemployed, Ki-taek's family takes peculiar interest in the wealthy and glamorous Parks for their livelihood until they get entangled in an unexpected incident.