Cadmus provides a gang of crooks with alien weaponry in an attempt to spread fear and panic among the populace. Meanwhile, Kara tries to mentor Mon-El with minimal success, and James decides that he wants to be a superhero.

While Cadmus captures Supegirl and Mon-El, Guardian and Winn go after a murderous vigilante that is letting Guardian take the blame for his murders. Meanwhile, Alex and Maggie have issues.