Hidden in the old alley where her grandfather’s courier station stands is a redwood parcel locker that can send regrets away. It connects parallel worlds, allowing sincere regrets to open the door to redemption. Chen Xiao takes over the station, convinced it’s all an absurd rumor, until people burdened by regret begin showing up: a young man who let love slip away, a lonely old man who missed his child’s childhood, a migrant worker who gave up on a dream… With each miraculous delivery, Chen Xiao gradually comes to believe in the parcel locker’s secret. She also meets Su Qing, who can sense fluctuations in parallel worlds. The two become partners, helping people make up for their regrets while facing crises caused by malicious ones. Together, they uncover the truth behind her grandfather’s disappearance and the mission that generations have guarded the parcel locker to fulfill. When malice from a parallel world breaches the barrier, they must find a “righteous regret” to restore the balance. In the end, they avert disaster and reunite with her grandfather, turning the courier station into a heartwarming haven. Yet they also discover that the path to protecting both worlds is far from over.
