Before Maci, Farrah, Amber and Catelynn return as teenage mothers, the audience is presented with a look at the most significant moments from 16 and Pregnant.
Leah and Jeremy marry in Myrtle Beach. Javi has a big surprise for Kailyn. Jenelle, Barb, and Kieffer celebrate Jace's 3rd birthday but Jenelle reveals she has some serious money problem. Chelsea celebrates her 21st birthday.
Teen mom Maci contemplates breaking up with her fiancé, Ryan, Farrah starts dating a new guy even though her family disapproves. Amber struggles to get her GED, and Catelynn feels distant from her daughter since the adoption.
Catelynn's family lashes out over her choice of adoption while Amber and her fiancé Gary come to blows. Farrah learns that dating isn't easy, and Maci struggles to balance motherhood and school.
Amber and Gary's arguing finally reaches a boiling point, while Catelynn struggles to find a home when her mother moves away. Newly single mom Maci has a change of heart, and boy-crazy Farrah opts for some protection.