Lin Xing transmigrates into a world of supernatural abilities, only to awaken an F-rank ability called "Power Source" and become the laughingstock of his entire school. Unexpectedly, the Thunder Law King System suddenly appears, allowing him to devour divine thunder and evolve continuously. Together with his friend Ling Yin, Lin Xing progresses from school trials to supernatural ability competitions, rescuing companions, capturing wanted criminals, and ultimately taking first place in the provincial martial arts examination. From absurd comebacks on campus to life-or-death battles at the Beicang Demon Pass, he consistently breaks through crises with unexpected moves while gradually understanding the responsibility he bears. As the Abyss Church emerges and an army of demonic beasts closes in, the cheeky, wisecracking teenager grows into a key force on the battlefield of the Demon Suppression Army. The laughs never stop.