Ahn Soo-ji and Lee Jae-joon, who are oblivious to each other's real profession as secret agents, are in an ill-fated relationship. Three years later, they accidentally meet targeting the same enemy.
Lee Shan and Ayo are ex-Interpol agents who are now bounty hunters, chasing fugitives for cash rewards. When the two of them are framed for a hotel-bombing, they join hands with a legendary bounty hunter named Cat, along with her teammates, to find the real bomber.
Jun-oh, an insurance claims agent, faces off with a client who he suspects of committing murders with the intention of collecting insurance premiums.
