In an international mystery case, a huge amount of US dollars accidentally fell into the hands of a family of four starring Liu Xiaoguang and Wen Song. Their peaceful life was broken by the mysterious case that they were inexplicably involved in, and they encountered various thrilling dangers. In desperation, Liu Xiaoguang and Wen Song, father and son, started a mysterious plan in the struggle between cowardice and courage. The four members of the family each had a "unique skill" and decided to combine the magical S4 heroes to start the Justice League action. They decided to unravel the mystery and find out the truth. They encountered various ridiculous stories along the way, and always turned danger into safety inadvertently, which made people laugh. As the case deepened, they found that the enemies they faced were becoming more and more dangerous, always appearing and disappearing, always hiding in the dark to chase and kill. Liu Xiaoguang used his magical dance steps, and Wen Song used his ancestral cute fists to subdue the transnational thief step by step. The S4 heroes lived up to expectations and easily passed the test in various amusing moments, maintaining the safety of the city's largest shopping mall.