In exchange for said dance she wants the head of John the Baptist. The devs say Fatale is "an interactive vignette in real-time 3D", and Silent Hill's Takayashi Sato designed Salome.
"It will be an interactive vignette in realtime 3D based on the story of Salome, particularly the play by Oscar Wilde." the site. It's a weird one for sure, but then so was The Path. If you like 'weird' and stuff with biblical ties then Tale of Tales' Fatale might offer something.