Lu Chen, a top student at Jiangdu University, is bound by an unserious 'system'. Failure means death, forcing him to confess his love to campus belle Chu Ning. Little does he know, Chu Ning is actually the eldest daughter of the underworld Chu family, dragging Lu Chen into the conflicts among the three major families of Jiangdu City: Chu, Gu, and Song. To protect Chu Ning, Lu Chen relies on firearm, combat, and other skills granted by the system, teaming up with Chu family young master Chu Yuanhong. With secret support from the Inspectorate, he fights a decisive battle against powerful enemies on the battlefield of an isolated island in the East China Sea. In this adventure intertwined with loyalty and power struggles, Lu Chen continuously grows and ultimately finds the faith and love he wants to protect.