After Mel and Jack finally tie the knot and the farm seems settled, a massive wildfire sweeps through a neighbouring ridge. The fire reveals ancient foundations beneath the soil—tunnels, bunkers, hidden ledgers—and with them, a secret society that’s been operating behind the kindness of the town.

Key Characters (fan-fiction):
-
Investigator Victoria: ex-federal agent, arrives in Virgin River under the guise of wildfire assessment—but she’s there for something else.
-
Mel’s Mother (Flashback Character): in 1978, she buried a suitcase in the forest after a tragic death. That suitcase resurfaces.
-
Jack’s Former Corporal (returns): he believes Jack stole info during deployment; he’s back to finish the job.
Major Arcs:

-
Episode 1: The fire. Mel and Jack wake to glowing ridges and ash falling. Victoria’s SUV arrives.
-
Episode 2-3: Mel finds her mother’s diary, referencing “the agreement made in 1979”. Jack confronts his past mission.
-
Mid-season: The bunker beneath the river bank—evidence of illegal logging, mortgage fraud, small-town cover-ups. Mel’s clinic gets hacked.
-
Climax: A secret meeting in the bar’s basement, voices say: “You weren’t meant to know”. Bomb threat. The river floods. The promise of comfort shatters.
Why this works:
-
Leverages characters people love—but pushes them into darker territory.
-
Combines romance, small-town charm and thriller trappings: fire, conspiracy, infiltration.
-
Gives viewers something fresh while still anchored in the world they know.