When the L'eihr aliens made contact two years ago, Cara Sweeney had no way of imagining that she'd be one of the first humans to live with one. Cara keeps a blog, and when her family is picked to host the first alien exchange student, she's thrilled at the chance to document her experiences. But things are rocky from the start. The L'eihrs share almost identical human DNA, and exchange student Aelyx is extremely smart and inhumanly good-looking, but that doesn't make him easy to get along with. And when Cara's school becomes increasingly anti-L'eihr, and dangerous, Cara begins to see Aelyx in a new light. As she realizes she may have more in common with Aelyx than she previously thought, she starts to fall for him. But Aelyx is hiding a terrible secret about his trip to Earth, one that could forever alter both of their worlds.