18=80

An 80-year-old woman named Sachiko Ameya lived a quiet and content life in her later years. As she neared death, she felt deep regret for not making peace with those she cared about and expressed a desire to see them again. Unexpectedly, she is given a second chance when she is transformed back into an 18-year-old. She begins this new life with uncertainty, stepping into a future she once left behind.