Teen Mom Jenelle's partying forces her mom to take away custody and Leah tries to work things out with the father of her twins. Chelsea tries to get on track to graduate, while Kailyn is heartbroken after her breakup with Jo.

Leah breaks down when the health of one of her twins is in question, while Chelsea starts hanging out with her ex-boyfriend. Kailyn starts dating a new guy, much to the dismay of her ex Jo and Jenelle tries to move back home.

Over the fourth of July, Jo's parents give Kailyn an ultimatum; lose the new guy and focus on school or find a new place to live, while Jenelle has a change of heart and agrees to sign custody of Jace over to her mom. Leah and Corey give it another shot and get back together and Chelsea tells Megan she's giving Adam another chance.