https://wccftech.com/resident-evil-village-guide-how-to-open-the-maroon-eye-door/

So you’ve survived your wander through the village and made it to Castle Dimitrescu. You’ve even survived your first encounter with Lady Dimitrescu and her three lovely daughters. But now you’re wandering around their castle filled with locked doors, trying to find a way forward as well as your Rose, and probably much-needed therapy too.

So if you happen to get stuck in Castle Dimitrescu after you were strung up by the daughters, this guide will walk you through exactly what you need to do next. There are several doors and it isn’t exactly clear which one you should be trying to find a key for. Be wary of spoilers ahead for the area.