Shen Tuo, the descendant of the Mohist Mechanism, took a bet with the warden of the Infinity Prison to save his wife Jiang Ren, a captive in the Fort of Mechanism. To win the bet, Shen Tuo, along with six teammates, has to go deep under the Fort and find the mysterious heirloom of Mozi. However, countless complicated mechanisms are installed in the Fort, with deadly traps on every corner. It is said that no one has ever walked out of there alive. Shen Tuo and his team are now embarking on an epic and life-and-death adventure....

During the Wanli era of the Ming Dynasty, Ding Jian, an officer of the Northern Branch of the Embroidered Uniform Guard, investigates a case of stolen firearms. In the process, his wife Su Qing is kidnapped by bandits. Ding Jian is forced to assassinate the Third Prince, leading to his wife's wrongful death and branding himself as a traitor. Seeking revenge and answers, he teams up with his friend Li Jinzhong, uncovering the truth step by step, only to realize that he himself is just a pawn in a larger scheme......