Robert was sent to Las Vegas to investigate dark magic that the Giovanni were up to. The local Ventrue realized the Giovanni were up to something magical and reported it to the Tremere to help. However, the balance of power between the Giovanni and the Ventrue in Vegas is very delicate, so the Tremere sent Robert since he’s a human and therefore it wouldn’t look like Camarilla intervention should Robert be captured or discovered. When he arrived, they were in the process of starting the ritual…