International student Jay comes to Korea for college. He struggles with fitness until personal trainer Jin Uk takes an interest in helping him, much to Jay's friend Seong Hun's dismay. Suspicions arise that Jin Uk may be linked to a crime.

A popular star, Piuno, who dislikes dogs due to trauma experienced in his childhood, meets Lee Dae Byeol, the owner of a dog cafe in Korea, and Gi Min who's one of his workers. Jun Hyeok is more than a friend to Dae Byeol and is one of his biggest supporters.