Caught in the Heartbeat follows young and promising man Tang Yi Xiu who embarks on a journey to become a policeman and meets our heroine Shi Gu Jing, a woman who hailed from a family of officers but was in an accident overseas which puts her in a coma. She eventually wakes up without any recollection of the accident. She meets the hero, both joining the police force, fighting injustice while trying to uncoverthe secrets behind her accident.