Lin Beixing accidentally returned to the age of eighteen. She found out that the accidental encounter of Zhang Wansen became the switch to end her time and space journey.
On the eve of her wedding, Lin Beixing is betrayed by her fiancé Zhan Yu. Heartbroken, she revisits an old phone and accidentally travels back to high school by deleting messages.
Back in the past, Lin Beixing learns that top student Zhang Wansen—who later falls from a water tower—blocked her “perfect life.” She decides to save him.
