Su Lan, a single mother and doctor, leaves her son and daughter in the care of her mother-in-law Zhao Chunlan. Obsessed with square dancing, Zhao Chunlan locks the door from outside, leaving four-year-old granddaughter Duoduo hanging outside the fifth-floor security window. Her seven-year-old grandson Chenchen risks his life to save her. Neighbor Wang Xiuqin tries to call for help many times, but Zhao Chunlan lies and hides the truth. Duoduo eventually falls. Later, Zhao Chunlan marries Li Defu in haste. To seize the property, Li Defu abandons Duoduo in a desolate mountain. After these two life-threatening disasters, Zhao Chunlan wakes up to her mistakes. At last, she finds redemption through reconciliation with her family and a brave act in a shopping mall.
