Set in the early 1970s Singapore, when rock music was banned and long-haired men were considered gangsters, "Wonder Boy" follows the story of 16-year-old Richard (Benjamin Kheng), an aspiring musician and the school’s social outcast, as he joins a singing group – The Wonder Boys – and embarks on his coming-of-age journey through youthful ambition, friendships and first love, all the while trying to have his music heard.