"If we can help you fix the watch," said Charlie, "you'll be able to use it properly."
Ava rolled her eyes impatiently. "Yes, that is the idea," she chaffed.
"You'll want to use it to find your sister, of course--" He hesitated when Ava's eyes widened and she turned a withering glare onto Abe.
Abe looked back innocently. "What?" he asked. "You didn't say it was a secret!"
Charlie chuckled. "Doesn't matter what you want it for, lass," he said. "But once you've done that, you'll do one thing for me. Just a little favor I can't do for myself."
Ava had been afraid of this. "And what kind of favor are we talking about?" she asked.
"Well, it will involve hopping around in time, of course. Your soon-to-be speciality. But it's of a rather sensitive nature, so let's just leave it at that." He grinned again and spread his arms wide. "We help you, and you help us."
Ava glanced over at Abe, who avoided her gaze. "This favor," she asked. "This is for both of you?"
Abe still wouldn't meet her eyes, but he nodded. "Both of us," he confirmed, in a voice that might have been shaking.