Maggie's world is turned upside down when she learns that her father, whom she admires, has a second daughter, Callie, whom no one knew existed. But she won't let a new family member get in the way of her summer plans with her best friend, Daija. They're determined to make tons of money braiding hair for kids around the neighborhood.

Daija's always felt like she had a sister in Maggie. So she can't let Maggie's new half-sister, Callie, take her place! And she can't let her interfere with their new Braid Girls business either. She needs the money to pay for extra ballet lessons so she can go en pointe and earn a spot in the fall dance showcase, making her distant father proud at last—if she pulls this off, he'll have to pay attention to her.

Callie's still grieving her late mom. Now she's leaving her old home in the Bahamas behind, including her old school and friends to move in with the father she's never met, plus his family. When she hears of Maggie's and Daija's business, she sees a chance to prove her skills and a way to be accepted.

With three very different girls on board, the Braid Girls arrive to a summer camp full of kids with locs begging to be braided. Business is booming, until rival Angela shows up with her friends and starts a new braiding business—the Sistahs Who Braid. With competition heating up, the Braid Girls are sure to have an unforgettable summer.