In this intriguing tale, Gu Xiaojiao, a young woman from 2018, and Lu Ming, a man hailing from 1999, find themselves awakening in the same bed, sharing the same moment in time. To their astonishment, they discover that stepping through the bedroom door allows them to journey through time. The adventure kicks off as they embark on a mission to alter events across both periods. Unbeknownst to them, however, their fate is controlled by an enigmatic figure.