Sixteen year-old Alexis Hartman wants nothing more than to smoke pot and play guitar. Getting high and escaping into her music seems the perfect solution when her world is shattered by her sister's death. But when she’s arrested for possession a second time, life couldn’t get any more complicated. Her mother's breakdown is the final straw that forces Lexi to spend the summer on the West Coast with her grandmother, Maddie. When Lexi steps over the line one too many times, she's certain her life is over and that she’s destined for juvenile detention—until Maddie decides that desperate measures are called for. A three week Mediterranean cruise—for seniors.

Eighteen year-old Ethan Kaswell, the poster child for good sons, is stranded on the cruise when his father, a famous heart surgeon, is called away. With his own life perfectly mapped out, Ethan finds Lexi’s unpredictability irresistible. Although he’s smart enough to see that there is no future in falling for a “vacation crush,” Lexi’s edgy dark side draws him like an anchor to the bottom of the sea. As the two embark on the journey of a lifetime, will Lexi mess this up too? Or will she finally learn to love someone—even when she has to let them go?