"Priest in Peril" is a quest in the game RuneScape, where players assist a priest named Father Aereck in rescuing his kidnapped friend, Father Urhney. The quest begins in the village of Varrock and involves solving puzzles and defeating enemies to progress. Players must navigate through various locations, including the Sewers and the Mines, to find clues and ultimately confront the antagonist, The Black Knight. Completing the quest rewards players with experience points and access to new areas, enhancing their gameplay experience in Gielinor.