Cadence Findley stood on the balcony of her hotel room gazing out at the fading sun, dancing off the turquoise waters, as the sky turned pink and gold. The tropical breeze lifted her hair up off of her shoulders and could’ve lifted her spirits if she wasn’t so deep in thought.

They’d been in Fiji for twelve days and had had a wonderful time. Most of those days had been spent on the beach, relaxing and doing nothing much at all. But they’d also gone sightseeing, hiking, zip-lining, snorkeling, all kinds of great expeditions she’d never experienced before.

Now, watching the sun begin to fade beyond the horizon, an unsettled...