Kim Bok-joo (Lee Sung-kyung), a young woman chasing her dream of becoming a weightlifter at a physical education college, secretly falls in love with Jung Jae-yi (Lee Jae-yoon), the older brother of her elementary school friend Jung Joon-hyung (Nam Joo-hyuk). At first, Joon-hyung teases her and helps her find her way back to him, but soon finds himself falling in love with Bok-joo.