Author's Note:

So this story is a little on the sad side. Maybe a lot on the sad side.

It stemmed from seeing Tuck Everlasting the musical. I've seen it two nights in a row and I've enjoyed it immensely both times.

And then this idea was born.

Kara had always loved The Wizard of Oz. She'd fallen in love with everything about it; the story of a girl finding her way home, the music, everything.

But then something happened.

Yes, Oz was still her favorite. But now there another one she held dear to her heart.

It started with Mon-El. Mon-El's insistence to read every book on earth.

He'd read Harry Potter and Romeo and Juliet but there was another one too, among the multitudes of books, that stood out to Kara now.

It was the story of a girl who meets a young man in a forest near her home. And then she meets his family. And they were...immortal. They didn't die.

At first, when Mon-El had mentioned the book, Kara had just nodded, remembering reading the book in school a year or two after arriving on earth.

But something changed.

Mon-El was gone now. He was who knew where. Would he ever return? Would she ever know?

And then one morning, Kara had woken up and decided that she was going to visit the Fortress. She didn't know why but she felt almost like she was being pulled there.

She had an article due and there was several Supergirl needs so it wasn't until late in the afternoon when she finally took off.

She walked in, remembering the different times she'd been here. Mxy's visit, when Mon-El had gone with Rhea, when she'd brought James, when she'd woken up after fighting Kal.

She still didn't know why she here.

She found herself in front of the computer. And she didn't know what to do. So she just decided to ask her uncle about life on Krypton.

"Kara," The hologram of Jor-El greeted his niece.

"Uncle," Kara smiled faintly.

"What can I do for you?"

Kara swallowed the lump in her throat. It was always hard to remember. To remember what was gone. What was gone to never truly return. "I-I want to know about what it was like on Krypton."

Jor-El nodded. Kara settled herself in front of the hologram a few yards away, leaning against a pillar.

"What did you know about life here on earth?" Kara asked. "For me and Kal, I mean. What did you know about what would happen to us?"

"We knew that you would gain powers under the yellow sun."

Kara nodded.

"We also knew that you and Kal would age slower than humans."

Jor-El's listener froze. Her head snapped up. "What?"

"We knew you and Kal would age at a slower pace than human beings." Jor-El explained.

"How slowly?" Kara asked.

"It is hard to say," Jor-El admitted. "We do not have an exact number but we knew you would most likely outlive most human beings of the same seemingly similar age as you."

"What?" Kara repeated. She felt as weak as when she'd fought Kal. And just as devastated as when she'd sent Mon-El off in the pod.

And out of nowhere she remembered. Remembered when Mon-El had told her he'd read a book.

It was called Tuck Everlasting.

It was about a family who lived forever.

Kara remembered reading it in school and thinking it was nice but that was all.

Now it felt all too real.

"Kara?" Alex rapped again on the door. "Kara?" The agent rummaged in her pocket and pulled out her spare keys. "I'm coming in."

There was no one there.

The lights were out.

And Alex's gut told her no one had been here for hours.

She glanced at her watch.

11:47. 11:47pm.

She hadn't heard from her sister since after Kara had told her she'd see her for dinner. That had been at four thirty after Supergirl had responded to a bank robbery.

Kara hadn't shown up for dinner.

Alex had nervously chalked it up to a huge car accident on the corner of Chester and Hester. But Kara never texted or called to say she'd be late. She never showed up at Alex's apartment later.

And then Alex was called into the DEO. There was an alien situation unfolding.

That's when Alex found out that Supergirl hadn't arrived at the car accident.

And she didn't turn up to help out with the alien.

She wasn't answering calls or texts. Her tracking device was off.

Alex had been hoping she'd find the hero at home, passed out in front of the tv; Kara had had a busy week.

It had been a weak hope.

Where was she?