Phase 1
Geralt finds messages on a quest board that lures him to investigate a location where people went missing. The message offered help, but no one came back.
At the location he finds a powerful mage scientist, who is much stronger. Geralt thinks that he kills the people that come to him for help. Fights the mage (Boss).
Geralt wins the fight: With witcher senses, he finds a hidden door, opens it, and all the missing people from the village are there, lying dead in a magic circle. There is a chest, in which he finds the quest reward.
Geralt loses the fight: Instead of dying, he is teleported into a new location, where the real quest begins.
Phase 2
Geralt wakes up in a location far far away in another world. In another dimension. At first, it looks like a dense forest, and he can go toward only one direction - to the top of a nearby hill. There, he sees the whole quest area: a lake, next to its right, a small village with a few houses and an inn, across the village is a mountain with a dungeon entry, on the mountain a big sculpture of a mage.
Geralt can progress the quest by choosing a number of locations to investigate. During the investigation, the quest will propagate where Geralt can find how he can escape with multiple ways. The way how he escapes determines the ending of the quest.
Dialog with an innkeeper with different choices: asking questions, asking him to trade goods, play a round of gwent.
There is a custom item that is used as a quest item. This item is treated as an artifact, where Geralt can either use it immediately once he gets it or by further investigating, he can find out that it needs to be used in a ritual circle. Doing so, he can teleport himself back to the “real world” where the villagers will also escape back to if the item is used in the ritual circle. Geralt now can defeat the weakened Mariska and investigate the strange magic she has used to trap people in order to finish the quest successfully.