Guo Zian, a "turtle type" man who has been cheated on by his fiancée three times, is struggling to survive in the city with his cute four-year-old daughter Guo Xiaonian. By accident, he discovered that he could understand the modern slang misused by people around him and obtain key information from it - the boss's "letting go" actually meant stealing company secrets; the neighbor's "eating tofu" hidden behind the conspiracy of underground banks; the kindergarten teacher's "fire" actually pointed to a kidnapping plan. In this era where everyone abuses slang, Guo Zian relies on this seemingly useless ability to resolve crises and make comebacks again and again. His ex-fiancée Lin Wan'er brought her wealthy fiancé to find trouble, and he used slang to see through his business trap; when his daughter was kidnapped, he relied on the kidnapper's misspoken slang to secure his position; even the mysterious organization "Slang Club" was eyeing him because he was the only one who could interpret the truth of slang. The protagonist of the Turtle series is nothing if he doesn't take action. Once he does, he explodes in a series, making everyone who looks down on him become a stepping stone on his way to counterattack.