As the stakes with Lex are raised higher than ever before, Lena must decide how far she is willing to go to stop her brother. Meanwhile, Supergirl and the team are faced with a challenge unlike anything they've ever dealt with before and it brings Alex to her breaking point.
When a powerful new villain, Psych, channels and amplifies everyone's fears in order to wreak havoc on Central City, Barry realizes, with Cecile's help, that he must face his own worst fear in order to beat this new threat. Meanwhile, Joe is surprised when Kristen Kramer from the Governor's Municipal Logistics Commission drops into CCPD for a visit. Iris warns her father to dig deeper on why Kristen is actually there. Caitlin and Frost argue about how to live their lives.
While preparing for the school's Parent-Teacher night, Archie is caught off guard when his former Army General shows up in Riverdale with some unexpected news. Cheryl pushes back after hearing that Hiram and Reggie have expressed interest in taking over the Blossom maple groves. Jughead's unconventional way to get through a case of writer's block causes Tabitha to be concerned for his safety. Finally, Betty and Alice receive some unexpected visitors.
As Brainiac lays close to death after trying to stop Lex, Supergirl and team soar in to save him, engaging in an epic battle with Gamemnae. After beating Leviathan, Supergirl turns her attention to Lex who has used the Obsidian platform to brainwash half the world to love him and follow him at all costs, no matter what horrible things he does. Knowing how dangerous this makes her brother, Lena enlists the entire team – Alex, J’onn , Dreamer, Kelly and Brainiac – to help, but Supergirl realizes that the only way to truly stop Lex is to sacrifice herself.
After the Bulldogs lose several football games, Archie and Veronica come up with a plan to boost school spirit. Jughead turns his attention to a student who he thinks might need his help. Betty seeks guidance from Cheryl after being faced with a difficult decision to make. Finally, Kevin is forced to face a dark moment from his past.