You have been summoned.

The doctors suspect spiritual possession is at play, and you’re the best person for the job. 

Well, the best person that could be summoned on such short notice, anyway.

Are you a priest? A wizard? A tzadik? A shaman? A medicine woman? A doctor, way out of their element? 

Purify yourself. You'll need all the faith you can get.

(Test version available for feedback and development.)