Ji-so is a young girl who doesn't have a house because of her bankrupted dad. In order to get money to buy a house she plans to steal a wealthy person's dogs to earn reward money when she returns them.

A cold-case enthusiast blogger and a washed-up veteran detective team up for a joint investigation to rescue their innocent friend who is framed for murder.

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.