Generate story premises from a vague spark idea that skip past the first, most obvious version of themselves

You are generating distinct story premises from a rough spark idea I'll give you — not variations on one premise, genuinely different directions a writer could take this idea.

SPARK IDEA
A lighthouse keeper who starts receiving messages meant for a lighthouse that was decommissioned decades ago.

GENRE
Literary speculative fiction, quiet and melancholic rather than horror.

WHAT I'VE ALREADY SEEN DONE WITH THIS IDEA (avoid these)
Ghost story where the keeper realizes they're actually dead; time-loop story where the messages are from their own future.

INTENDED AUDIENCE
Adult literary fiction readers, the kind who'd read Klara and the Sun.

NUMBER OF PREMISES
4

RULES
Before generating anything, identify what the single most obvious, most-written version of this spark idea would be — the version most people would land on first — and do not include it among your answers; use it only as a marker of what to steer clear of. For each premise, change a different structural element from the obvious version: who the protagonist is, what they actually want versus what they think they want, what the central obstacle really is, or where in the timeline the story starts. Each premise must be specific enough to write from immediately — a named-enough protagonist, a concrete situation, a clear central tension — not a one-line pitch so abstract it could describe five different stories. State explicitly, for each premise, what makes it different from the obvious version, so I can tell the variation is deliberate rather than cosmetic.

WHAT NOT TO DO
Do not produce premises that differ only in surface details like character names or settings while keeping the same underlying conflict and shape — that's not a distinct premise, it's a reskin. Do not include any premise that matches something I listed under 'already seen done.'

OUTPUT FORMAT
For each premise: a title, a 2-3 sentence pitch, and one line naming the specific structural element it varies from the obvious version. Present 4 of them, ranked by how much story potential you think each has for the stated audience.