Mariah Mundi has no choice but to unite with the enigmatic Will Charity when his family is kidnapped by an unknown enemy. Their adventure leads them to the mysterious and majestic Prince Regent, a huge steam-powered hotel on a small island at the furthest reach of the Empire. Mariah, with the help of Sacha must unravel the secrets of the island to find the truth behind the disappearance of his family, and prevent Otto Luger from getting his hands on the mystical and powerful Midas Box.