After ending her past relationship, Shen Qing unexpectedly meets Yan Bei on a rainy night. To cope with her family's urging, she asks Yan Bei for help to handle them. Through repeated interactions, the two gradually grow closer, moving from temporary partners to getting their marriage license. Shen Qing believes Yan Bei is just an ordinary man temporarily down on his luck, and is willing to start over with him; Yan Bei also slowly lets down his guard in her warmth and trust. As the pressure of the Yan family engagement and clues to his identity continuously emerge, this unexpectedly begun relationship gradually moves towards sincere protection.