After a genius agent, Lin Lan, is accidentally transformed into a 10-year-old girl by a mysterious biological light, she takes on the identity of her colleague’s daughter to continue solving cases in secret.

Retired special forces soldier Cheng Kai infiltrates the terrorist-held Talin stronghold searching for his missing wife, a medical worker, and with crucial aid from kidnapped girl Mirra, battles mercenaries and overcomes lethal perils to rescue her from their clutches.