After a dispute with Paulie Bleeker (the baby's father) over him dating another girl, Juno drives to the house of Mark and Vanessa Loring (the adoptive parents of Juno's unborn baby). Mark is home and tells Juno that he is leaving Vanessa. Vanessa comes home and Mark tells her everything. Juno becomes upset because she doesn't what her unborn baby to be brought up in an unstable household. Juno leaves and after time alone, she comes back to Mark and Vanessa's house and leaves a note on the doorstep. Juno then gets back together with Paulie. Juno's water breaks and she is rushed off the hospital by her father (Mac) and stepmother (Bren). Juno gives birth and Paulie comes to see her after completing an athletics meet. Juno and Paulie choose not to see the baby as they don't want to become attached to it. Vanessa is at the hospital and is given the baby, which is a boy, and Bren congratulates her on becoming a new mother. Vanessa is at home with the baby, Mark has left, and the note that Juno left on their doorstep has been framed. It says, "Vanessa, if you're still in, I'm still in, Juno." The film fast-forwards to summer and Paulie are still together. They play guitars and sing a song together.