Synopsis:

Juliette hits a career high, including singing a duet with Steven Tyler, but her personal life plummets; Avery takes care of baby Cadence at his parents' home in Texas; Rayna deals with the aftermath of Deacon's liver transplant.

(From ABC)
Steven Tyler guest stars as himself to sing a duet of “CRAZY” with Juliette Barnes. With Juliette’s starring role in the Patsy Cline bio-pic, she is at an all-time career high, but is hitting a personal low. Meanwhile Avery, separated from Juliette, tends to baby Cadence at his parents’ home in Texas. Rayna, along with her family and friends, grapple with the chilling aftermath of Deacon’s liver transplant.

(Recap From ABC)
(Recap From Wikipedia)
One month later the premiere begins with Rayna sad and sleeping alone, leading viewers to believe that Deacon has died. It turns out that Deacon is alive. Beverly has had an aneurysm and is in a coma. Meanwhile, Juliette is on top of the world: she has a new album coming out soon, and her new movie is a big hit. Rayna is done with Juliette and officially drops her from Highway 65. Avery has been staying in Ohio with his parents and is hurting, and seriously missing Juliette, when he texts her, she dismisses his message, ignoring him. Jeff is back to lying to Layla, and playing her, only to make money. Back in Nashville, Maddie and Daphne get letters from Teddy who is in jail. Maddie refuses to read hers, while Daphne reads hers and Maddie's, as she clearly misses Teddy. Later that night, at Juliette's concert, she is visited by Steven Tyler who surprises her, and they perform "Crazy" as a duet. She also is visited by Rayna, who tries to help her, but is only yelled at by Juliette, and kicked out. Avery's parents offer to have him move to Ohio with them, which he later declines, saying Nashville is where his home is. Kevin and Will try to have a nice night out, but Will is getting yelled at by woman he has slept with, and can't take the pressure of being in the public eye. Meanwhile, Gunnar and Scarlett try to record together, but end up kissing each other, only for Scarlett to leave, saying she loves Caleb, and she records her part of their music by herself. While this is all happening, Beverly wakes up, with Deacon by her side. At Rayna's house, Maddie comes down to find Daphne reading her letter from Teddy, they end up fighting with Maddie telling Daphne that Teddy is not innocent. As this happens, Deacon comes in and tries to break up the fight, only for Daphne to yell at him, saying that he is not her dad. She clearly misses Teddy and feels left out. While Juliette is out partying, she runs into Layla, where she tells her that Jeff does not love her, and only cares about her, leaving Layla sad. On Rayna's way home, she googles herself, much to find out that her label is a flop, just like Juliette had said, and that she is not having good luck at all with her label. Avery moves in with Will, and Gunnar, along with Cadence. Scarlett sees Caleb and tells him that she loves him, and Juliette is shown missing Avery and Cadence, while looking at pictures of them.