GNOSIS COMPANY

Chinese secret agent Da-hee receives intel that a large number of illegal firearms are being smuggled into Korea and is sent to investigate the case. She meets Su-han, who is supposed to help her with the case, but due to his lackluster skills they fight over trivial things. But as their witnesses are suddenly murdered, the two of them quickly become the prime suspects.

Bong Soo loses his memories from an accident, which disables him to recognize his family. Due to this condition, and his ever-increasing odd behaviors, his relationships get mixed up. He treats his wife as his daughter and mistakes her daughter for a friend. Ironically, his friends and family start to accept the situation as they derive some comfort and warmth from it.