Thirty-year-old game original artist Shen Yue received a package without sender information on an ordinary Thursday. After opening it, it turned out to be the tin clockwork toy soldier that he cherished most in his childhood, but had been lost on the day his sister disappeared ten years ago. When he subconsciously twisted the rusty clockwork, time went back ten minutes. This humble old toy has become the key connecting the past and the present, and it has also become the only clue to uncover the truth about my sister's disappearance.