Lu Yan, a retired soldier, unexpectedly awakened his talent for martial arts, but a mysterious force erased part of his memory. When he woke up, he came with a "complaint buff", which can increase his combat power by blaming others, and can break conspiracies with his venomous tongue. He recuperated his body with medicated diet, regained his lost memory, and fought against the crazy villain who conducted human experiments. He also picked up a clingy and innocent silly sweet Su Xiaotang as his "little tail". From being a gangster on the street to tearing apart experimental subjects with his hands, Lu Yan uses his complaints and strength to sweep through the urban undercurrents, vowing to find out the murderer behind the scenes and uncover the secret truth of the world of Gaowu.
