May, 1980. Man-seob is a taxi driver in Seoul who lives from hand to mouth, raising his young daughter alone. One day, he hears that there is a foreigner who will pay big money for a drive down to Gwangju city. Not knowing that he’s a German journalist with a hidden agenda, Man-seob takes the job.

A working single mother comes home one day to find that her daughter and the nanny have disappeared -- and this is just the beginning of her nightmare.

A comic book storekeeper, Dae-man, and the legendary homicide detective, Tae-su, who met on previous case quit their jobs to open a private detective agency.