J'onn asks that Mon-El stay at the DEO until he is fully examined. An alien body is found, and the DEO track down the murderer, who is kidnapped by unknown armed men. Maggie and Alex track him down to a secret facility hosting people of high political and economical status run by a woman, later identified as Veronica Sinclair, also known as Roulette. The aliens are forced to duel, sometimes to the death. They spot M'gann as a contestant before Kara intervenes and is attacked by an alien called Draaga, who overpowers her and escapes. J'onn confronts M'gann, who says that she believes herself guilty of surviving the extinction of her species. Veronica abducts J'onn and M'gann. Using Lena, Kara finds the address, where J'onn and M'gann are forced to duel until J'onn convinces her to stop blaming herself and they refuse to continue. When they are attacked by Draaga, Kara arrives and defeats him thanks to Mon-El's advice, dissuading the other aliens from protecting Veronica, who is arrested but later released by orders from higher up. Alex asks Maggie to get a drink before Maggie's date arrives, while Kara decides to train Mon-El. M'gann secretly shapeshifts to reveal that she is a White Martian.