Cosima lays down in Felix's bed, staring at the ceiling, her mind racing. They are going back to the island. Will they be able to find anything? What if Delphine isn't there? What if Delphine is there? She doesn't think her heart will be able to take it, any of it. The stress is burning through her like an ember stoking slowly in a fire.

They have a plan. She tries to relax herself, slowing her thoughts, going through what they had discussed earlier.

Art will arrange the helicopter. They will go in two trips, leaving Allison and Felix behind. They aren't cut out for this type of adventure and someone needs to stay back and watch the kids. Cosima will go first with Sarah and Helena. Art, Scott, and Mrs. S will follow closely after.

If there is any danger present, they will hide and wait until the other group gets there. Strength in numbers.

The island is meant to be deserted. They will have a look around, find the swan, search for any clues.

Cosima takes a deep breath. One step at a time.

She tries to be methodical, think of this like a scientist. Don't think about how scared Delphine is.

She has the support of her family now. With them behind her, they will be able to accomplish much more. There is a slight feeling of comfort knowing that they believe her now, that all those years are not lost. They are all in this together, as they always have been. She relaxes her body, slowly slipping into sleep, knowing she'll need all her strength for the journey that lies ahead.

"Ok, you're all set," Art shouts, as he gets them strapped into the helicopter. "Remember, we'll be a few hours behind you, so wait for us if you see anything suspicious."

Cosima nods. "We've got Helena with us. I think we'll be ok," she smirks.

"Just don't do anything stupid," Art answers, "I'm looking at you, Sarah."

"Yeah, yeah," Sarah responds, rolling her eyes. "We'll be fine, Art. Just doing a little detective work."

"I'm not so sure it's just that. Please be careful."

The copter takes off and soon they find themselves high above the ground, looking down to the scenery below. It's bittersweet, the rolling hills and calm water, juxtaposed with Cosima's feeling of pure dread. The idea that something can exist that is so beautiful while the love of her life is suffering.

The island comes into sight. They are going to search the house first, that's the plan. They swing around to the landing strip nearest to the house. As they approach, Cosima sees it, quiet, looming. The fear grips her as she recalls what she saw the last night she was there. Rachel, Susan Duncan...all the memories come flooding back to her and she gasps. Sarah grabs her hand and looks at her.

"It's going to be ok, Cos," she soothes, "We're here for you."

Cosima nods as they land. As soon as they depart the helicopter, she feels the chill. It's freezing, and she knows it will only get colder. She doesn't want to think of how terrible she felt that night, the hypothermia taking over, her body giving up, until...until Delphine…

She shakes her head. She needs to focus.

"Come on," Sarah beckons, "Helena, are you ready?"

"I got your back, sestras," Helena says as she giggles.

"Oi, meathead, come on," Sarah plays, throwing her arm around Helena's shoulder and offering her other hand to Cosima.

The three sisters walk together up to the house. It's completely quiet and dark inside. Cosima knows it won't be dark for another four or five hours, so they have some sunlight left.

"Wait," Helena instructs, throwing her arms out to stop Sarah and Cosima from walking. "I will go first, look around. You stay here until I make sure to give you clear coast."

"Make sure the coast is clear?" Cosima asks.

Sarah just shakes her head, grinning. Helena is already off, walking closer to the house. She is inside before they can protest.

Cosima looks out toward the water, thinking about the hope she had felt the last time she had come there. Hope for the cure, hope to save her sisters. She had done all that, and she thought it would make everything better, but the fact that Delphine disappeared had made her feel completely empty inside.

"Hey," Sarah startles Cosima from her thoughts, "Deep breaths, Cos. We're doing everything we can."

"Are we?" she retorts, suddenly realizing she has tears in her eyes.

"Yes, we're doing what we can right now. Come here," Sarah replies, pulling her into her arms. It's soothing not just for the comfort it brings, but for the warmth she now feels radiating through her chest.

The door clicks open. "All the coasts are cleared now. Nobody inside," Helena tells them.

Cosima isn't sure if she's disappointed or relieved. She needs to find that book. See if there are any answers there. They head inside, closing the door behind them.

The silence inside is unexpected. It's quiet in an eerie way, like something doesn't feel quite right. Cosima heads downstairs to the room she is most familiar with, the one where she found the cure, as Sarah and Helena search the upstairs.

Cosima finds the door already open, most likely from Helena's thorough search. The room is oddly still. She walks inside slowly, telling herself that it's fine, there is no one here, yet she still feels that uneasiness in the pit of her stomach.

She looks around. There are papers and books lying everywhere, thrown about, perhaps from when the house was searched years ago. She pours through the piles, looking for the one book that is important to her. She gasps when she sees it, peeking out from the bottom of a dusty pile.

Placing it on the table, she opens it, finding the page with the swan on it, the dust flying up and coating her glasses as she coughs. She removes them to wipe them clean before placing them back on her face.

The swan drawing comes into focus as she runs her finger over the page. She looks intently, searching for something, anything.

There's nothing there.

She sighs, thinking about what Kira had said. 'Find the swan, find the swan.'

Cosima sits on the chair next to her, face in her hands. What does it all mean? What is she supposed to do now? She wishes she could still communicate with Delphine, that she could somehow get one more clue to put this puzzle together. Is this crazy? They have come all the way back to this island. And for what? Delphine could be anywhere. She is no closer to figuring things out, and doesn't know where to go next.

She jumps as she hears someone walk into the room.

"Sestra?"

She looks up to see Helena, closely followed by Sarah standing in the doorway.

"I think I find something. Come."

Helena leads them to the end of the hallway. "Here, sestra." She points to the wall. Hanging in the center of the wall is a large, round plate made out of what appears to be stone. There is a picture carved into it that is barely visible in such low light. Cosima steps closer, running her finger over the smooth ridges. Her eyes go wide.

The swan.