Top agent Da Xi, drugged during a mission in the Middle East, spends a night with a stranger to survive. Believing it to be a fleeting encounter, she falls into a coma after a hotel explosion. Six years later, now a bodyguard for CEO Huangfu Yue, she grows close to his father, Huangfu Chen. After rescuing Yue from kidnappers, Da Xi discovers he is her long-lost son.
