In the middle of the bustling city, a sudden rain brought Lan - a third-year student of the National Economics University and Duong - a mature and strong young man approaching his 30s, at the same moment. They are different in age, work and pace of life... But they are drawn together by simple stories and inexplicable similarities. When their love just blossomed, Duong discovered that Lan was hiding a secret about her health, and Lan was left with two choices: to let Duong stay by her side and face the challenge together, or to leave so that he could continue his stable life.