Theatre Fire?

That's a good clue Don!

This can be taken from any aspect, as there is a dolly mixture here on the forum, you could take it as from your normal position or function in theatre. As either a punter,  in FOH, on Stage in the dressing room or Bio box.

Being plunged into darknesss could be from a blackout cue extended because of a malfunction of equipment, the operator has keeled over or fallen asleep. All you know is there is a heap of smoke, it's dark & you have not a clue what's going on. As fire can happen at any time during any performance, what would you do?

By the way the emergency lighting won't activate unless the venue power supply is disrupted in some way &/or the Mains Power is switched off.