The cousin who came to the family for help many years ago changed the direction of her life. She once wanted to escape, but after a sudden accident, she depended on each other for life. And the reluctance at the beginning also turned into dependence and the most profound affection in the temper of time. When family ties are tested by friendship and love, how should we choose? And when the mysteries that were once evaded are solved one by one, can the two hearts that have been overwhelmed can still rely on each other?