Sunny lives on the islands with his Grandma Ella, who receives a letter from Sunny's mother Pearl in England, telling them that she wants him home. Young Sunny is hostile towards her at first, and begins to feel the music, bursting into song during church.
Years later, Sunny is part of the Subsonics, a music crew led by Shake. At a recording session with Rasputin, they run into The Blades, another music crew, led by Benny Baker, Ma Baker's son. Later at a launch party for Asia Blue, Benny's girlfriend, Sunny and Rose meet. When Ma Baker finds out her daughter is seeing Sunny, she goes to visit him, and gives him a coat once owned by his father, Johnny Cool. Upon asking his mother about it, Pearl explains how Ma Baker was Johnny's dance partner—and took her away from her when she was pregnant with him.
After a music battle between the Subsonics and the Blades, Shake is shot by Benny, but when Sunny gets the opportunity to get payback, he does not take it, instantly being disowned by the Subsonics, and subsequently breaking up with Rose. Rasputin tells him to make it up with Rose, but he is arrested, accused of shooting Shake, as Benny and Ma have set him up.
As the Notting Hill carnival takes place, Shake, Rose, Asia, and Sunny appear. It is revealed that someone has given evidence against Benny over the shooting—Benny's best friend, Naz.