Kim Sun-woo is an enforcer and manager for a hotel owned by a cold, calculative crime boss, Kang who assigns Sun-woo to a simple errand while he is away on a business trip; to shadow his young mistress, Hee-soo, for fear that she may be cheating on him with a younger man with the mandate that he must kill them both if he discovers their affair.

Set in Jeju, the drama revolves around a loving, multi-generation family led by the parents, Yang Byung Tae and Kim Min Jae, and their four children Tae Sub, Ji Hye, Ho Sup, and Cho Rong, as well as assorted grandparents and uncles. The story follows the family's everyday lives and conflicts.

A self-made medical student and an aspiring anchorwoman find their friendship — and their dreams — tested by a fateful tragedy.