When Hank commandeers the Waverider in 1973, the Legends find themselves on the run in an RV after kidnapping the President who is only able to tell the truth. With the help of Constantine, they discover the reason that none of them can lie making for an uncomfortable family road trip. Meanwhile, Nate and Zari, with the help of Nora and Gary, work together to find out what Hank is really up to.
The Battle Rounds continue as the coaches enlist Charlie Puth, Kelsea Ballerini, Brooks + Dunn, and Khalid to prepare their artists to go head-to-head in the hopes of advancing to the next round.
With the school in danger of being shut down, the gang hatches a plan to save the day. Meanwhile, Quinn and Tammy embark on a drug-fueled vision quest.