Kara and Mon-El had returned after retrieving the Kryptonian stone that they needed in order to save Sam and destroy Reign. Lena had worked tirelessly for days in order to save Sam and they did. Sam was back to herself and had no part of Reign left inside of her. Ruby was happy to have her mother back. And everyone at the DEO was glad that Reign was now gone for good. Kara had decided to go back to Argo City and be with her mother and she destroyed the stone in order to make sure that no other Kryptonian would be able to be turned in to another Reign.

The goodbye party for Kara was in full effect, but Lena couldn't help but feel sad. Lena knew that Kara Danvers, her only and best friend, was Supergirl. Lena, Winn, and Alex had created the device that would send Kara back to Argo City to be with her mother and the rest of her people. Lena had broken up with James a few days earlier, knowing that her heart would always belong to Kara, she didn't think that it was fair to him. Kara was leaving in a half an hour and Lena just couldn't bring herself to say anything to Kara about loving her or knowing that she was Supergirl.

Mon-El had approached her and thanked her for all of her help, but Kara had stayed away from her and Lena figured that it was due to Kara not trusting her. Mon-El was going to go to Argo City with Kara, to be with her, he and Imra were now separated by time. James was there saying goodbye to Kara, when he mentioned that they would now be without a bullet-proof superhero. It sort of brought the party down and they decided to send Kara off early. They had given Lena the device to activate because the rest of them knew they wouldn't be able to do it, though they didn't know Lena was going to hate herself for doing it.

"Take care. I love you." Alex said as she hugged Kara again and kissed her forehead.

"You too. And I love you too Alex." Kara said.

"I'll miss you Supergirl." Winn said with a sad smile, "But I'm happy for you."

"I'll miss you too Winn." Kara said as she hugged him.

"Be safe my daughter." J'onn stated as he hugged Kara.

"I love you J'onn. Take care of Alex for me."

"Of course. And I love you too."

"I'll do my best to protect the city." James said softly.

"I know you'll do a good job." Kara said softly back.

Kara said her goodbyes to everyone except Lena, she didn't know what to say to her, she knew just how much she had hurt her friend and she didn't want to make it worse by adding that she was Kara Danvers.

"Goodbye Lena." Kara said as she and Mon-El were standing in the teleportation area.

Lena knew that she had three seconds after she activated the device to say what she needed to before Kara and Mon-El would be transported. She also knew that they didn't have a way back after they were gone.

Lena activated the device, blue lights filled the area where Kara and Mon-El stood, Lena now had her three seconds.

"Goodbye, Kara. I love you." Lena stated just loud enough for Kara to hear with her superhearing.

Kara looked at her with surprise, but before she could say anything, she and Mon-El disappeared.