This place isn't Menador. ...probably. It could conceivably be just a different part of Menador. The horizon is shrouded in ominous fog, so it could really be most places. 

There's a farmhouse nearby. The door is hanging open, creaking in the wind. Nothing's growing in the fields.

Well, that pattern-matches to Ustalav, but really this is confusing enough as an eventuality that it could be Arcadia and he certainly wouldn't know. He casts Guidance on himself and tries to spend it on resisting an illusion, which is either not there or stronger than his save, and then he trudges for the farmhouse on the grounds that terrible haunted shelter might be better than no shelter and he won't know till he tries.

The farmhouse has two ghouls in it. They turn to look at him, something strangely alive in his eyes, and at first don't move, as if waiting for instructions; then they lurch towards him murderously.

Channel!

They're worse for the wear, but only moderately so, and now singlemindedly determined to come bite him.

Yes, well, he does have his mace out from the snake thing and can bash them.

He can, narrowly, avoid getting paralyzed by their claws before he's ground them into ghoul paste. 

Back to eerie quiet, then. There's nothing else evidently in the farmhouse but some rags on the floor.

He checks for a cellar, an outhouse, a silo, any other possible ghoul repositories.

There's a barn and a cellar. Those don't have ghouls. ....how perceptive would you say Blai is?

Oh, ballpark a plus two, give or take ungameifiable minutiae.

In the miserable foggy distance there are things stirring, moving, blending into the fog. 

...also in the miserable foggy distance, in a different direction, there are voices and hoofbeats and footsteps. A sizable party of people on the move.

...he'll light up his holy symbol. Ghouls aren't known for their voices. Or hoofbeats.

However, the undead are known for shining strange lights in the distance to lure you into a trap! The war party will keep going.

"Excuse me! I'm lost! - also not a ghoul!" he calls.

...they do pause, at that, but the undead can also fake cries for help. ...usually they have a more recognizable accent when they do it, really.

"It's a trap."

"Almost certainly. With the aim of delaying our return, most likely, so prepare for an ambush before we're in sight of the city - no, everybody, don't pause, keep moving -"

"I'm a third circle cleric and prepared a Create Food!"

This is a bizarre thing to shout in a terrible accent across an enormous distance and also explains nothing! Someone Teleport-capable could conceivably have landed off course on their way to Canorate, someone Plane Shift capable likewise, but there is no reason for there to be a third circle cleric in the wasteland out here, and also the light - which is, according to Dayi, Bellene's familiar, a holy symbol held aloft by a man jogging in their general direction - is a ...sword...which isn't any god she's heard of. 

Well, shouting across vast distances probably doesn't pose much risk. Their location is already known to the enemy. And she already has Clarion Call up herself, since they're out of the city.  "THE CONCERN IS NOT THAT YOU WOULD NOT BE WORTH RESCUING IF IT WERE SAFE BUT THAT IT IS ALMOST CERTAINLY A TRAP OR AT BEST AN EFFORT TO DELAY US" she shouts back. "IF YOU CAN CATCH UP WE'LL ACCEPT YOUR SURRENDER. IF YOU CLAIM TO SERVE AN ALLIED GOD I'LL SEND A HORSE." And probably lose the horse, but in principled if he were a third circle cleric of an allied god gone astray in a teleportation accident it'd be worth the horse many times over.

"I'm a cleric of Iomedae!"

"THAT IS CLEARLY UNTRUE AND ALSO A BIZARRE LIE TO TELL!"

"...I DON'T KNOW WHY THAT WOULD BE, I'M REALLY REALLY LOST."

Because there is no god by that name on this planet and you are clearly not speaking Taldane through a translation spell or you'd be speaking it better, but she probably should not give the enemy advice on how to convince her of things. 

"Send him a horse."

"We'll lose the horse."

"Probably. But - no number of horses will save us. Only a miracle will." She has lowered her voice. You can't just go around telling everybody that only a miracle will save them, though she really thinks that ideally you would be able to tell them that and they would be able to consider the matter soberly and still do their work.