A girl named Lemon comes with a mysterious message and involves the ordinary Ah Xin in a thrilling agent storm.In order to protect important people and the truth, he embarked on the road of tempering to become an action spy.However, in the shadow of being difficult to tell the truth about, the conspiracy of the two-sided spies spread like a spider web. Can Ah Xin tear off the mask of lies in the midst of crisis and crack the deadly layout hidden behind trust?A contest about courage, loyalty and self-transcendence is quietly kicking off...