Surgeon Mi Ka was rescued by Xing Kelei in a hijacking incident. Since then, Mi Ka has been obsessed with this "masked" hero. Three years later, the two met again in the emergency rescue training camp and didn’t recognize each other. Their different concepts brought about by career make the two get along unpleasantly and have some misunderstandings. After their joint efforts to successfully rescue others by times, the two make a better impression on each other and their hearts come closer.