Chi Yuan suffers a car accident, and his memory stays at age eighteen. The once cold CEO turns into a sunny big boy. Eighteen-year-old Chi Yuan is full of Jiang Wanyin, whom he has secretly loved for many years, enthusiastically and clumsily launching a pursuit of his wife. But Chi Yuan will eventually face the problem of memory recovery; the barriers of past marriage and outsiders' meddling swarm in. Amidst the tug-of-war and entanglement, the two untie the past knot and achieve bidirectional redemption.