This is one way how to do Serapis Unites side quest in this let’s play video of Assassin’s Creed: Origins. Stopping by a Serapis Temple we encounter a Priest that needs his wrongfully jailed drummer back. After rescuing the drummer we also need to clear his name, and we do.
We earn 800 XP
Assassin’s Creed: Origins is set in Ancient Egypt during the Ptolemaic period and recounts the secret fictional history of real-world events. The story explores the origins of the centuries-long conflict between the Brotherhood of Assassins, who fight for peace by promoting liberty, and a secret cabal—forerunners to the Templar Order—who desire peace through the forceful imposition of order.