Lin Yue, a girl from a seaside town, and Su Ran, a boy from a prosperous city, lead completely different lives, but are involved in each other's worlds through a bizarre exchange of consciousness.
In strange bodies, they clumsily imitate each other's words and deeds, experiencing completely different daily lives. They shared secrets through messages on their mobile phones, leaving tiny traces in each other's lives.
As the number of exchanges increases, clues hidden in time gradually emerge: a rusty brass key, dusty old letterheads, the past of the lighthouse on the typhoon night of 1998... Two seemingly unrelated souls are actually closely connected by a bond that spans time and space. When the fragments of memory piece together the unfinished regrets of their ancestors, can they grasp their own attachment in the chaotic time and space?
