When the electric grid and Gotham's cloud computing technology get knocked out on the same night, the Metropolis High Hamsters must figure out how to deal with the city's loss of power.
General Note: Includes an excerpt from DC super hero girls: weird science by Amanda Deibert and Anti/Hero by Kate Karyus Quinn & Demitria Lunetta."DC graphic novels for kids"--Back cover."Based on the hit animated series!"--Cover."Supergirl based on the characters created by Jerry Siegel and Joe Shuster. By special arrangement with the Jerry Siegel family."