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

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

Steven and Lapis Lazuli go on an adventure.

Steven helps two friends get along at the barn.

When an envoy of Rubies arrive, Steven proposes a game of baseball.

Steven and Greg take Lapis on a boat trip out to sea and find themselves in dangerous water.

Steven and Amethyst visit some friends in the country but Amethyst isn't being herself.

Steven and the Gems revisit the Moon Base.

In this double episode Steven’s autumn visit to the barn brings a new stranger into his life.

Connie tells Steven the story of how she, Peridot, and Lapis attempted to take the Crystal Gems' places as the protectors of Beach City while he was in space.

"Navy", one of the Rubies who came to Earth to find Jasper, crashes on Earth and is welcomed in by Steven to be a Crystal Gem. However, Lapis Lazuli does not trust Navy's overly optimistic nature, knowing of her previous encounters with her.

Pumpkin goes missing.

Ronaldo spots something mysterious on the moon, and Steven goes to investigate.

Steven faces his biggest challenge yet.