If you have the fuel to run it and someone to pilot it, a helicopter can be the ideal vehicle during a zombie outbreak. Thankfully, the survivors have one, so they're going to use it to check out a distress signal they've gotten from a nearby hospital. That's where you find yourself in On the Fly, a new Zombicide: Rue Morgue scenario available now.
From the post:
We’ve picked up a faint distress signal from a nearby Hospital. This old hunk of junk helicopter has kept us going, let’s see if she can fly one more mission.
This mission requires Rue Morgue to play.