Steven befriends a magical mirror that can mysteriously communicate with only him and ends up setting free its trapped inhabitant, a Gem named Lapis Lazuli.

Lapis Lazuli disappears after reigniting a past conflict with Garnet, Amethyst and Pearl, and takes the ocean along with her, leaving Beach City in a panic on the first day of summer. Steven, Connie, Greg, Lion and the Gems go on a mission to confront Lapis and set things back to normal.

Steven, Pearl and Greg work together to build a spaceship so that Pearl can revisit the wonders of the cosmos, but Pearl gets a little carried away.

Lion keeps lying on Steven's face while he's sleeping. This leads to Steven discovering a pocket dimension in Lion's mane.

Steven becomes uneasy after seeing an unknown object traversing through a warp stream, despite the Gems' attempts to disprove his claims.

While practicing how to fuse with Gems, Steven accidentally fuses with Connie, forming a half-human and half-Gem, human fusion called Stevonnie.

Steven and Amethyst try life out on the road. During so, Amethyst reveals a dark secret about herself and the Gems to Steven.

When several droids from space descend towards warp pad zones, Steven and the Gems attempt to track down their purposes.

Pearl takes Steven to a special place that belonged to Rose Quartz after Lion finds the scabbard for Rose's sword.

Steven and the Gems need Greg's help to retrieve a message from the Wailing Stone.

Peridot and her new partner, Jasper, arrive on Earth.

Trapped on Peridot's ship, Steven attempts to rescue the Gems from the Homeworld's clutches, including two Gems named Ruby and Sapphire.