Luo Jingping, a sophomore in ordinary high school, and her boyfriend Lin Tianxia broke up due to a misunderstanding on the one-year anniversary of their love. The sad and desperate Jingping ran away from home holding the baby hamster Tianxia sent - Dean. After meeting a strange man on the street, Ningxia took Dean to a deserted place. Here, a strange rock travels through three lives. During these three reincarnations, the entanglement between her and Tian Xia gradually became clear. In the previous life, there was a broad agreement between life and death, as explained by Zicheng. In this life, I wish to hold my son's hand and grow old together with him!