Hyun-soo, a clumsy health trainer, is ranked last in sales in his later years. On the other hand, team leader Dong-joon is always the top seller with his dense sales skills and active touch. Then one day, Sang-mi, Hyun-soo's old female friend, registers at Hyun-soo's gym. Hyunsoo is trying to stop Dongjun who's aiming for Sangmi....