Plot
Supergirl is ordered by her mother Allura to find and apprehend her father's murderer Reactron. However, her mission is hindered by a costumed woman who arrives in Metropolis calling herself Superwoman. After meeting this so-called Superwoman, the Girl of Steel has several pressing questions: who is Superwoman, really, what gives her the right to wear the symbol of the House of El, and what side she is on?
Supergirl (Volume 5) #34 (Why the World Doesn't Need a Supergirl)
Supergirl (Volume 5) #37 (Who Is Superwoman? (Part I of VI) - Faces of Evil)
Supergirl (Volume 5) #38 (Who Is Superwoman? (Part II of VI) - Clashes)
Supergirl (Volume 5) #39 (Who Is Superwoman? (Part III of VI) - Ticking Clocks)
Supergirl (Volume 5) #40 (Who Is Superwoman? (Part IV of VI) - Mistakes)
Supergirl (Volume 5) #41 (Who Is Superwoman? (Part V of VI) - Daughter of Krypton)
Supergirl (Volume 5) #42 (Who Is Superwoman (Part VI of VI) - Epilogues & Homecomings)