“Maybe. But they don’t have accents.”

“You’ve heard them talk?” Alex asked, sounding impressed.

“Yeah, I’ve seen them at Pearl’s Diner across from the library. They always order milk shakes.”

“Didn’t there used to be four of them?”

“Yeah, I think so.” Gemma squinted, trying to be sure she was counting right. “Last time I saw them out here, there were four. But now there’s only three.”

“I wonder where the other one went.”

Gemma and Alex were too far away to understand them clearly, but they were talking and laughing, their voices floating over the bay. One of the girls began singing—her voice as clear as crystal, and so sweet it almost hurt to hear. The melody pulled at Gemma’s heart.

Alex’s jaw dropped, and he gaped at them. He moved away from the rock, floating slowly toward them, but Gemma barely even noticed. Her focus was on the girls. Or, more accurately, on the one girl who wasn’t singing.

Penn. Gemma was sure of it, just by the way Penn moved away from the two girls. Her long black hair hung down behind her, and the wind blew it back. She walked with startling grace and purpose, her eyes straight ahead.

From this distance in the dark, Penn shouldn’t have noticed her, but Gemma could feel her eyes boring straight through her, sending chills down her spine.

“Alex,” Gemma said in a voice that barely sounded like her own. “I think we should go.”

“What?” Alex replied dazedly, and that was when Gemma realized how far he’d swum away from her.

“Alex, come on. I think we’re bothering them. We should go.”

“Go?” He turned back to her, sounding confused by the idea.

“Alex!” Gemma said, nearly shouting now, but at least that seemed to get through to him. “We need to get back. It’s late.”

“Oh, right.” He shook his head, clearing it, and then swam back toward the shore.

When Gemma was convinced he was back to normal, she followed him.

Penn, Thea, Lexi, and Arista had been in town since the weather started warming up, and people assumed they were the first tourists of the season. But nobody really knew exactly who they were or what they were doing here.

All Gemma knew was that she hated it when they came out here. It disrupted her night swims. She didn’t feel comfortable being in the water, not when they were out in the cove, dancing and singing and doing whatever it was they did.

TWO

Capri

The slamming of a car door startled her, and Harper sat up, setting aside her e-reader. She hopped off her bed and pushed back the curtain in time to see Gemma saying good night to Alex before coming in the house.

According to the alarm clock on her bedside table, it was only ten-thirty. She didn’t really have anything to bust Gemma on, but Harper still didn’t like it.

She sat down on her bed and waited for Gemma to come upstairs. It would take a few minutes, since their father, Brian, was downstairs watching TV. He usually waited up for Gemma, not that she seemed to care. She still went out, even when Brian had to be up at five A.M. for work.