The story takes place in a small city dominated by teenagers. In an accident, the protagonist Lin Ran becomes sworn friends with Gao Ge, Qian Lei and Zhao Wu and forms the "Iron Head Gang". The teenagers work together and grow up in daily conflicts on campus and in the streets, and face misunderstandings, challenges and confrontational forces on campus together. After experiencing betrayal, misunderstanding, separation and danger, they each grew up, harvested and protected precious friendship. In the end, under a huge conspiracy that affects the survival of the team, everyone unites together, is wise and courageous, and saves the day, composing a passionate youth legend that belongs to them.
