Two rival a cappella teams bring in professional coaches to give them an edge for the summer season; the coaches have eight weeks to prepare the teams for the Summer Invitational.
The teams take on two new competitors; Stay Tuned struggles with their first choreographed song; Deke takes a chance with a new soloist; Diana may have to forfeit when a key team member does not show up the day before the competition.
Stay Tuned learns half of their team will not be able to attend this week's competition; Coach Diana takes a huge risk by giving the lead solo to an unsuspecting member of Highlands Voices.
The members of Highlands Voices decide to push back at Diana's methods; Stay Tuned's natural talent is threatened by a natural disaster.
The stakes are high as the first elimination round of the Summer Invitational approaches; members of Highlands Voices continue to disagree with some of Diana's choices; Stay Tuned lacks the confidence they need for their next performance.
Diana and the Highlands Voices prepare to do whatever it takes to come back from the previous week's loss; Deke and Stay Tuned plan a song that speaks to an iconic high school experience.
Deke tries a new tactic and decides to play it safe in the semi-finals; Diana hopes to take her group to the next level with some professional help.
Diana and Highlands Voices put everything they have into this week's performance; after highs and lows throughout the season, Deke's group relies on their emotions in an effort to win the title.