Valentina believes she's in for the summer of a lifetime when her mother marries her new wealthy boyfriend and is set to leave for their honeymoon just when summer vacation starts. It is her last year in town, and she has plans to make the best of her break before heading off to college. When her mother reveals that her new stepbrother will be coming to town to keep an eye on her while they're gone, she starts bidding her fun summer goodbye. That is... until she sees him. Maybe the summer won't turn out to be so bad after all. It's not wrong if they're not blood, right?