Hyun Shu (Jin Love) struggles to raise her two daughters Wan Zhi (Gao Zhixing) and Tianzhi (Jin Xiangqi) by her meagre income from working in the supermarket. Although the two girls are sisters, they have diametrically opposite personalities. Wan Zhi is withdrawn and rebellious, and his relationship with his family is very cold; Tianzhi is cute and cute, often thinking of ways to make his mother happy. What let Xianshu and Wanzhi did not expect is that the optimistic and cheerful Tianzhi unexpectedly chose to end his life one day, and the bad news was like a thunderbolt in the clear sky over the head of the Hyun Shu family, making the already hard life more difficult. However, even so, Hyun Shu and Wan Zhi are strong enough to maintain a normal life. By accident, Wan Zhi accidentally learned some information about her sister's death, which made her understand the real cause of her sister's death and some secret she tried to hide.