You open your eyes after coughing up some seawater, your vision being filled by the face of a heavyset fellow dressed in diving gear.

"Hello? Are you alright? Just take some breaths. My name is Dave. What's yours?"

You take a moment to breath in and out before looking around: it appears you're on a small boat in the middle of a blue hole surrounded by islands. Dave looks at you, worry clear on his face.