Connected by a mysterious antique pocket watch, Zhang Jing Chan and Li Wei Yi are suddenly transported back in time, where they discover their souls have been swapped. Forced to live each other's lives, they become determined to protect their families and rewrite the painful fates that bind them. As the two navigate tangled timelines, hidden truths, and growing emotional burdens, they realize that changing destiny may be far more complicated—and dangerous—than they ever imagined