On the first day of the divorce waiting period, Lin Banxia's ex-husband, Lu Zhengdong, suddenly undergoes a bizarre transformation, uncontrollably switching between his adult and teenage forms. Lin Banxia is forced into the absurd situation, which unexpectedly brings her back into Lu Zhengdong's life. Both carrying wounds from the past, the two adults gradually let down their defenses as they spend more time together, choosing to face each other with genuine feelings. In the process, they slowly heal and redeem one another. When the divorce waiting period finally ends, they let go of their past misunderstandings and choose to put their names together once again.
