This is the most popular works in the age category of young adults. Heroes of the series are three students named Erfan, Faraz and Sina. These guys are outstanding students in their school who have received awards from school for appreciation.
Erfan is skillful in the field of puzzle works. He is a man of though, logic and art. He can easily convince other people.
Sina acquired the first rank in scientific competitions. He does research and study a lot. Typically, he is mobile library and other students ask him any questions. He made a small laboratory in their house and does different examination.
Faraz as a strong, fearless and somehow headstrong athlete tries to solve problems without thinking which causes some troubles for the group. He lives with his grandma (nana).
With the help of their teacher, Mr. Kooshan, who is a vocational and technical teacher at the school, the three students want to use their abilities to help and support the products of their city. They are going to stand against three wrongdoers of the story name Chief Booreh and his colleagues Faloodeh and Rizeh to stop smuggling and unsupervised import that incur damages to their economy.