Tianyi and Tianmei, twin sisters who lost both parents, have lived together since childhood. When an earthquake occurred, their sister Tianmei escaped a disaster by exchanging identities with her sister. The heartbroken sister has since faced life as a sister, fulfilling her wishes and also meeting the love she had missed.

A complicated, one-sided secret attraction sends ripples through the lives of a mild-mannered student and her dashing classmate.