Alien refugees, the Phorians, trigger telekinetic quakes every time that Lena and Rhea activate the portal. While James tries to get through to one alien boy who knows where the others are, the DEO tries to find the portal before it's too late for National City.

Lillian comes up with the ultimate weapon to drive the Daxamites off of Earth, but Supergirl is reluctant to make the sacrifice necessary. Instead, she challenges Rhea to a ritual trial by combat to save National City and Earth. Superman returns. Cat Grant offers Supergirl some sage advice.