After dying from a groundbreaking heart surgery, genius surgeon Xie Linran wakes up in the body of a 7-year-old orphan.
To get closer to his comatose real body, he secretly guides ER doctor Lin Wan through impossible medical emergencies.
As sabotage, livestream chaos, and life-or-death surgeries push them to the limit, his true identity begins to unravel.
But through saving others, he finally learns what it truly means to be a doctor — and finds love along the way.