Sara破处后的第二天醒来发现自己怀孕了，而且已经怀了9个月，更可怕的是她怀的居然是个外星人。Sara’s one of the cool kids… but she’s totally terrified of losing her status. She’d be a lot more secure if she could just win back her super-hot ex, Skyler, but he’s not interested unless they move to the next level. She decides to take the plunge — but something about Skyler changed on his summer trip to Mexico… something in his nards.Sara wakes the next morning only to find that she’s nine-months pregnant. Desperate to keep this under wraps, she turns to the only person she can trust: her nerdy ex-best friend, Hayley. But after a trip to the clinic results in Sara birthing something other-worldly, the girls realise their night is only just getting started…