A love-struck mermaid named Aquamarine supplies adventure and insights to two twelve-year-old girls, life-long friends who are spending their last summer together before one of them moves away.
When best friends Chris and Win go on a cross country bicycle trek the summer after graduating and only one returns, the FBI wants to know what happened.
How can one pair of jeans fit four friends as different as Lena, Bridget, Tibby, and Carmen? As the girls trade the pants back and forth over one magical summer, each explores love, loss, and friendship.