A new girl, Emily Kmetko, comes to train with they veterans at the gym and finds that they are both impressed and threatened by her.

Taking a gamble that the girls are ready and can use the motivation for Nationals, Sasha invites Marty and the Denver team to The Rock for an invitational meet. Payson is determined to show that she is the best, but when an old injury flares up, it might have devastating results. Emily is also resolved to show what she can do, but Sasha has other, less advanced plans for her. But with reigning Nationals champion Kelly Parker (guest star Nicole Anderson, “JONAS”) in tow, are the girls really ready for the Denver gym and this challenge?

Meanwhile, Carter has to rethink his relationship with Kaylie when Sasha and Lauren give him an ultimatum.

The National Gymnastics Championship in Boston has arrived and now everything the girls of the Rock have been working for is at stake. Can Emily pull it together on the biggest stage of her life? Can Lauren put aside her anger towards...everyone and pull off a gold medal winning meet. Can Payson get past the back pain and finally beat Kelly Parker on the National stage? Find out in the Mid-Season finale.

The girls devise a plan to get Marty fired; Sasha attempts to find a place for Payson at the gym.

Emily finds out that her mother is dating Steve after Lauren confronts Chloe. Meanwhile, Payson has an appointment with a top-ranked back surgeon; and the National Team must prove their worth and step up their game.

In the season finale, everything is put on the line as the girls go up against the Chinese team to prove once and for all that they're the best.

Kaylie, Lauren, and Emily have their final National Team practice before World Team tryouts, and Ellen Beals seems to have it out for Emily before the practice even starts!

Kaylie is put in rehab for her eating disorder and makes a new friend, Maeve, a model who has been in and out of rehab before. Sasha decides to leave The Rock and move back to Romania. Emily is told that under her probation that she is under house arrest and must wear an ankle monitor.

On the way to the international meet in Hungary, the girls get a connecting flight to Romania to convince Sasha to come back to The Rock.

Kaylie finally returns to training at The Rock, but the public is under the impression that her time away from the gym was from an ACL injury, not rehab for anorexia. Soon after, Sasha announces that Kelly Parker is going to replace Emily on the World team, and that Kaylie will be replaced, as well, since she has not had enough time to train.

Kelly Parker's manager, Shelia, arrives at the gym and starts scheming to make Kelly the most recognizable girl on the team, which includes trying to get Kelly to sabotage Kaylie by exposing her anorexia to the public. Meanwhile, Payson and Max come across a stray puppy while out jogging, and as they try to keep the puppy hidden until they can find it a home, Lauren becomes jealous of the amount of time they're spending together.

Shelia continues her quest to ruin Kaylie, which now involves taking away Kaylie's new endorsement deal with Healthy Bar. However, after hearing Kaylie give an interview about how Kelly should be the team captain because of her experience and accomplishments, Kelly starts to feel differently about their rivalry. At the same time, Kim and Summer start to put the pieces together about the true origins of the Payson/Sasha kiss video.

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Coach MacIntire introduces a new training technique that pairs up each of the girls with a permanent training partner.

With only six weeks to go until the Olympics, Coach MacIntire is starting to feel the pressure as it appears his coaching style is not yielding the results everyone was expecting.

The girls are visited by their families, and Payson's dad gives her some bad news while Kaylie tries to curb her parents' feuding by making Austin tag along to a family dinner. Elsewhere, Lauren is advised to consult a doctor about her condition.

The girls compete in the semi-qualifications. Meanwhile, Kelly's mother tries to take down Kaylie; Payson gets overprotective about Lauren's health issues; and a new curfew halts Payson's burgeoning romance.

In the series finale, Payson boldly changes her floor routine, jeopardizing her spot on the team. Meanwhile, Kaylie's shocked by her drug-screening results; Lauren weighs her recovery against her Olympic dreams; and Jordan won't accept help from Kaylie.