Orphan Ma Tianyou was raised by nuns in a Macau monastery, and grew up with Sister Connie, who knows the truth about his parents but kept it secret. At 19, Tianyou goes to HK to find his birth parents and ends up living with retired Dr. Fung. He meets the Wong family and falls in love with Ah Heung, but their relationship is complicated by their sibling-like bond. Back in Macau, Sister Connie reveals the painful truth that Tianyou's father is Fung's son, Fung Yue-lai, who had a complicated past with her and her friend who died giving birth to Tianyou. After struggling to accept his philandering father, Tianyou gradually reconciles with him.