Senior Lieutenant Kang Seok-Min joins the Korean navy to follow his dead father's footsteps, with a goal to become an admiral. Seok-Min bumps into a doctor at the hospital his sister is working, however Hae-rin shuts everyone out since her boyfriend from college died. However Seok-Min is not the only one in love with her, Seung-ha is in love too with her, but he is unable to explain it to her as his friend already confessed his love to her.