Storyline!
Kara starts to change after her beloved Lena died in the hands of Reign. Kara vows to take revenge on her. Kara just lost the one person who made her feel like she was human, now that Lena's gone, Kara Danvers doesn't matter anymore. Kara blames herself for Lena's death and never fully forgave herself for it. Despite having holograms, Kara can't get over her death. Kara feels empty and alone, little does she know that Lena has been watching over her, through the bad and all. Lena watches Kara struggle in pain as she can do nothing about it. Kara's change in behavior starts to concern her closest friends, mainly her sister Alex. Alex tries to tell Kara that the Old Kara would've never given up on herself like that, only to have Kara scream at her saying that " Kara Danvers was a mistake". Kara starts to take a trip down memory lane and asks forgiveness from Lena since she broke their promise of always going to be there and protecting Lena. Lena still watches Kara from above. Kara reminisces about when both of them were younger. As Supergirl keeps the vow she made to Lena, she gets badly hurt in the process of defeating Reign. Alex finishes Reign off but it was too late, Supergirl had already been hurt. As Kara is healing, she goes to where ever Lena is. Kara tells Lena she thought she'd never see her again and Lena tells kara finally that she had always been watching her and always will be. As Supergirl is healing, Alex begs for her sister to wake up.