To begin the sequence, head back to the Assassin's Den, located below the Cafe Theatre, and enter through the tunnel at the waterside. Head up the stairs and towards the council area, and a cut scene ...

Sequence 04 becomes available as soon as Arno makes it through the Server Bridge: Fin De Siecle. Sequence 04 begins in the Old Assassin's Den, hidden in the Cafe Theatre in the Ile Saint-Louis ...