A cruise ship is a place for couples, retirees and rich people - very not a place where girls in their teenage years like Alina would like to spend their free time. Accordingly, shes not very excited when her mother steals her holidays and decides to stay on a luxury ship for a few weeks - together with her annoying stepdad and her silent stepbrother, too. But when she meets Mika, Charlotte and a bunch of other people she has to realize that it wont be boring after all.