A group of robbers, led by Chet Miner, starts challenging Supergirl using alien guns. Cadmus demands the repealing of the Amnesty as a solution. Kara deduces that Cadmus is arming Miner's team. Lena holds a fundraiser, which is attacked by Miner and his men. She reveals to Winn that the fundraiser was a ruse for the robbers, and they activate a device that destroys the alien weapons, leading to the robbers' arrest. Miner and his team are killed by Cadmus before he can expose them. The Cadmus leader is revealed to be Lilian, Lena's mother. Meanwhile, Kara takes Mon-El to CatCo for work, but he continuously ignores her commands, leading to being fired. Alex convinces her to let him choose his own path. James starts operating as a vigilante. Winn finds out and initially blames him, but finally decides to help, intending to make a suit for him. Alex learns that Maggie has broken up with her girlfriend and offers her another date, with Maggie realising Alex is a lesbian, and Alex herself accepting the fact.