Some weeks after the events of the episode "Change Your Mind", Steven Universe and Connie Maheswaran discover a brand new world through their dreams: the Night Dimension. They are attacked by living emboidments of nightmares, losing all their Ideyas (the orbs that represent aspects of their hearts) except the Red Ideya.
Thankfully, they are not alone in this world: soon, they met NiGHTS, a jester-looking being imprisioned on a blue gazebo-like containment for Ideyas who is willing to help Steven and Connie claim back their Ideyas and defeat the leader of Nightmares, Wizeman. However, it's not gonna be easy, and they must stay brave to put a end to the nightmares of the Wicked.
(Constructive reviews are more than welcome.)