In the emergency department of a hospital in H city, nurse Mao Li and "ice cube" doctor Han Tongtong often clashed at work, and they had deep prejudices against each other. During the fight against the COVID-19 epidemic in early 2020, they devoted themselves to the front line of the fight against the epidemic despite the opposition of their families. In the process of fighting the virus, they forged a comradeship and became lovers in white who cherish each other and fight side by side. In early March 2020, the medical teams aiding Hubei began to evacuate in batches, and Mao Li was diagnosed as a patient with new coronary pneumonia! Mao Li changed from a medical staff to a patient, and Han Tongdong changed from her comrade-in-arms to her attending doctor. While fighting the disease tenaciously, the two gained a deeper understanding and consensus on love, life and ideals. In April 2020, on the streets of H City, this year's cherry blossoms bloomed particularly brightly and intensely, seeming to pay tribute to the heroes. Mao Li, who had recovered, walked up in the shadow of flowers and temples. She took the courtship rose from Han Yongdong. The two embraced each other sweetly, and the lovers finally got married.