Delves into the realities of an aging society and centers on Ye Xiaolin – a former killer turned caregiver. She infiltrates and kills seniors under the guise of offering care, but her life takes an unexpected turn after a chance encounter with zookeeper Ma Deyong. As their fates become entangled and detective Zhou Ping begins to investigate the string of murders, a gripping story unfolds. The film raises awareness of aging-related societal issues by focusing on the themes of death, family dynamics, and the dignity of aging.
| Actor | Role |
|---|---|
 Wan QianYe Xiaolin | Ye Xiaolin |
 Rao XiaozhiMa Deyong | Ma Deyong |
 Qu ChuxiaoZhou Ping | Zhou Ping |
 Huang XiaoleiMai Taiting | Mai Taiting |
 Zhao ZichongMa Taian | Ma Taian |
 Sun QingchangMa Shan | Ma Shan |
 Guo YiqianZhang Qiang | Zhang Qiang |
 Ou JianyuXiao Jian | Xiao Jian |
 Liao NiSan Er | San Er |
 Zhao ChengshunZhou Ping's Father | Zhou Ping's Father |
 Ren JieZhou Ping's Mother | Zhou Ping's Mother |
 钟远林Zhou Ping's Grandpa | Zhou Ping's Grandpa |
 Deng GangOu's Brother | Ou's Brother |
 Liu JunOu's Sister | Ou's Sister |
 Ma MingXiao Liu | Xiao Liu |
| XXu QianqianSis Ou | Sis Ou |