Kara has moved to National City where she has made it her home. She has became a reporter at Catco Worldwide Media. When several earthquakes hit National City, Supergirl goes to discover who is creating them. She meets Reign, an alien creature similar to Kryptonians. She runs the City to ruins, giving her the call sign 'World-Killer.' Can Supergirl defeat her and uncover the truth of who she is?
