Jo confronts Kailyn about dating Jordan behind his back and she moves in with her mom, while Leah and Corey continue planning for their wedding when they get some good news regarding Ali’s health. Jenelle and Kieffer hatch a plan to run off to New Jersey and things between Chelsea and Adam continue to go downhill.
Jenelle and Kieffer are forced to ask Barbara if they can move in with her and Chelsea’s dad continues to put the pressure on her to force Adam to find a job. Kailyn starts dating her ex without telling Jo, and Leah and Corey put wedding planning on hold as the try to get some answers by bringing Ali in for an MRI.
Things between Adam and Megan reach a boiling point and he forces her to move out, while Barbara helps Jenelle get her financial aid and invites her to attend Jace's first birthday. Things improve between Leah and Corey and their romance heats up, and Kailyn moves back in with Jo's parents and tells everyone that she doesn't want to be with Jo.
While Jenelle is trying to figure out how to pay for school, she breaks Barbara's rules again, and things get tough for Corey and Leah once she's stuck at home watching the girls full time. Adam moves in and Chelsea tries to keep it from her dad, and Kailyn starts school but has to figure out where she and Isaac should live when Jo's parents kick them out.
Teenage mom Kailyn is forced to borrow money from Jo to make her school payments, and Chelsea breaks the news to Meghan that she's going to let Adam move in with them so Aubree can have a normal family. Jenelle meets a new guy and stays out all night with him, and Leah and Corey decide to move in together and find their own place.
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.
Leah breaks down when a doctor's visit reveals that there's something wrong with one of the twins and she turns to Corey for comfort, while Chelsea starts hanging out with her ex-boyfriend Adam again, much to her friends' dismay. Kailyn starts dating a new guy but things go haywire when Jo and his family find out about it, and Jenelle convinces her mom to let her come home when she realizes how much she misses Jace.
Teen mom Jenelle is going out all hours of the night, causing her mom to serve her papers to take away custody of baby Jace, while Leah attempts to win back Corey, the father of her twins. Chelsea moves out of her dad's house with baby Aubree and tries to get back on track to graduate from high school, and Kailyn is heartbroken when Jo breaks up with her, and tries to get over it by flirting with a guy at work.