The Elder Scrolls Online has a vast and rich lore with countless stories. Regarding the'save Casimir' story, it could potentially be related to one of the many factions in the game. For example, if Casimir is a member of a particular guild or a citizen of a certain city - state, his peril might be tied to the power struggles between different groups. The player might be tasked with rescuing him from captors, who could be bandits, cultists, or agents of a rival faction. To fully understand this story, it would be best to explore all the relevant areas in the game, talk to NPCs who might have information, and follow any leads that present themselves.
Well, without more context, it's difficult to give a detailed account of the 'save Casimir' story. In Elder Scrolls Online, many stories involve complex characters, political intrigue, and magic. Maybe Casimir is a character who got into trouble in a certain area like a war - torn region or a place full of dark magic. And the player has to go through a series of tasks such as fighting enemies, solving puzzles, and making moral choices to save him. But again, this is just speculation without more information.