In the forgotten corner of Nanhua Middle School, the "Time Slot Investigation Club" quietly restarted.
An antique radio that can capture fragments of objects' memories, and four students with very different personalities.
They listened to the echoes of the past and solved the dusty mystery of youth:
Lost farewells, unsent love poems, altered answers...
However, when the investigation touches on the hidden past of president Chen Yao, a huge secret shrouded in the rainy night gradually emerges.
Are they repairing someone else's regrets, or are they opening up a scar that they dare not touch?
Can listening to the past really illuminate the present?
Purpose: Reconciling with the past can lead to a better future