During his PhD studies, Shu Ren falls in love with his junior, Sun Shu. However, family crises cause Shu Ren to drop out without telling Sun Shu, who leaves for Japan to study. Five years later, they reunite at Si Kang Hospital, where Shu Ren seeks reconciliation, but Sun Shu coldly rejects him. As Sun Shu’s mother falls ill, their bond reignites. Shu Ren struggles with guilt over his mother's past death,
