In SUPERGIRL #34, Supergirl took the new secret identity of Linda Lang. But how long until someone finds out her secret? Now, for the first time ever, witness Supergirl's initial attempt to live her double life in "Linda Lang: Day One"! Plus the secret origin of Superwoman revealed! What drove Lucy Lane to become the superpowered threat known as Superwoman? How did she transform from Lois Lane's little sister into Project 7734's secret weapon? Find out here!