The protagonists of the story are five villains who have done all kinds of evil - the elegant pickpocket "Big Bad Wolf", the well-informed safe thief "Greedy Snake", the calm and steady master of disguise "Beautiful Belly Shark", the irritable thug "Piranha", and the sharp-tongued hacker expert "Hacker Spider". They are the most notorious "Bad Guys Alliance". They are usually powerful and commit crimes everywhere, which makes people terrified. Until one day, they suddenly want to become model citizens, but the road to transformation is very difficult, and there are endless accidents, which makes people laugh and cry.