Sunni and Blaise face their most dangerous challenge yet in their third and final adventure.

When a mysterious oil lantern and a box of painted slides appear at Blackhope Tower, Sunni and Blaise are drawn back to the place where their adventures first began. When they discover that the slides conceal secrets about artist-magician Fausto Corvo, the pair find themselves once again caught up in a deadly pursuit. An old enemy is still tracking Corvo and will stop at nothing to find him. Sunni and Blaise must fight to protect Corvo's secrets and rid themselves of Soranzo's evil threat once and for all.