Stef and Lena take measures to keep Brandon and Callie apart. Meanwhile, Jesus has problems in the wrestling team. Kelsey, Mariana’s friend, reveals a secret of Mariana’s past.
Lena’s ex-girlfriend comes to visit and reveals a secret. Callie wants to help Talya when an embarrassing video of her is circulating around the school.
As the earthquakes worsen, Supergirl, Alura, Guardian and the DEO protect National City; Imra and Brainiac 5 return to help. M’yrnn gives J’onn one final memory before merging with the earth to stop the terraforming and the heroes defeat the priestesses.