Olivia's best friend is not imaginary. He’s not a ghost, either. And she's pretty sure he's not a hallucination. He’s just Mason. He is, however, invisible. When Olivia spotted the crying little boy on her front porch at five years old, she had no idea she was the only one who could see him. Twelve years later when new-girl Robin bumps into the both of them and introduces herself to Mason, they are both stunned. Mason couldn't be more pleased that someone else can see him. Olivia, on the other hand, isn't jumping at the chance to welcome Robin into their circle. Jealousy may have something to do with that, but honest fear that Robin's presence will put Mason in danger is soon validated when a strange black car begins showing up everywhere. The race to find out what Robin knows in time to protect Mason from whatever threats are coming becomes Olivia's only focus.

Seven girls are travelling home from a swim meet with their team when they pass a car with 7 hot guys in it. Immediately the team starts pressing their faces against the windows, batting their eyelashes, and waving. But the guys aren't paying attention to the others. Their eyes are attached to the 7 who aren't looking their way. Their hearts scream mate, but there are some problems. The girls don't know who they are and the guys are already graduated from high school. How are they going to claim their mates?