A sixteen-year-old high-school student named Juno MacGuff has just discovered she is pregnant. The father is a good friend of hers – Paulie Bleeker, though she didn’t count on this to result from his first time. Realizing she wouldn’t be fit to raise this child, she initially considers an abortion. When she reaches the clinic, however, she changes her mind and decides to put the baby up for adoption instead. Juno manages to find a couple – Mark and Vanessa – willing to agree to a closed adoption.