Single mother Lu Tian'er takes her daughter An'an to escape debt entanglement, and unexpectedly reunites with Gu Huaichuan, who had entanglements with her years ago. One night of fate in the past unexpectedly makes An'an the bond between the two. Grandma Gu discerns the child's identity, and a paternity test uncovers the sealed past. Facing past misunderstandings and the constant pressure from creditors, Lu Tian'er is resilient and independent, not relying on attachment, and pursues her career with her own ability. Gu Huaichuan lets go of his knot of many years, transforming into a solid backing to protect the mother and daughter. After going through numerous twists and turns, the two resolve their estrangement and head together towards a warm and fulfilling new life.