Getting There From Here - Writing Exercise

A frequent novice question is, how do you get from point A to point B? This writing exercise is structured to help you practice this skill. Great writers can concoct the most ingenous ways to advance a scene.

This exercise can be a scene or an entire story (if the story is under 1500 words). I've provided the starting and ending points. I've also included a few story elements that must appear somewhere in the scene/story.

Start:
... POV Character hears someone at the door.
End:
... POV Character is in deep water (literal water).

Character Detail:
A character knows CPR.
Setting Detail:
Desk
Plot Detail:
POV character is hiding a crime.