Direct answer
Objectives follow journal display order. Some depend on your choices; follow the active objective in the game.
Result
Every story has to start somewhere. This one starts in the guest room at Kaer Morhen, the stronghold of the witchers in the Blue Mountains. It starts with Geralt taking a bath, disproving the theory that witchers neglect personal hygiene. But as he's bathing, he is brusquely interrupted by Yennefer - does she ever interrupt in any other way? She reminds him that he was supposed to train with Ciri. What could our hero do but bid the sorceress farewell and descend into the courtyard of the fortress? Little did he know this would mark the start of a great adventure.
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