After losing her virginity to Ricky Underwood at band camp, Amy Juergens discovers that she's pregnant. As Amy contends with her family life, and struggles to come to terms with her pregnancy, she seeks solace from her friends, Lauren and Madison. Meanwhile, Grace Bowman, the most popular girl at school, promises abstinence to her parents.

Lauren and Madison accidentally reveal Ricky's involvement with Amy to the school. Meanwhile, Grace is torn between forgiving Jack and moving on, and Amy experiences her first bouts of morning sickness.

Ben's clingy behaviour begins to annoy Amy, who is also struggling to cope with her family life. Meanwhile, Jack seeks comfort from Adrian after his plans to see Grace fall to pieces.

Amy and Ashley's grandmother visits. Elsewhere, Adrian flaunts her budding friendship with Grace.

Assisted by their friends, Ben and Amy marry in secret. Meanwhile, Tom asserts his independence after meeting a new girl.

As Amy's due date inches nearer, Grace and Adrian decide to throw a baby shower for her. While preparing for the party, Jack and Grace have a moment where they reconnect.

When Grace begins to pull away from everyone, Ricky takes it upon himself to try to help her out.

Adrian and Amy's fighting escalates and Ricky intervenes.

Most of the gang ditch classes and are pursued by the new school counselor; Amy and Anne take a mother/daughter vacation.

Grace's love of self-love comes out at school in the form of a campaign called "Just Say Me". Which has girls all across school abandoning sex with guys in favor of a more personal activity that has the same end result.

Meanwhile, Adrian's own campaign of trying to be Amy's friend bears fruit when Amy invites her over for a visit.

A messy custody battle ensues as Amy and Ricky continue to disagree over their rights as John's parents. Still angry with Ricky for breaking up with her, Adrian sides with Amy and encourages several of their friends to do the same. Elsewhere, George grows more frustrated with Anne's refusal to get re-married right away. Ben and Grace get closer, and Ashley feels ready to make some changes in her life.

As Ben continues to examine his options, he and Adrian have a huge blowout. Adrian finally gathers the courage to take all of the baby's things out of the would-be nursery.