London in 1900. A brilliant scientist leaves the world to create his own empire underground. He is determined to prove his radical theory - that gravity is a geometric property of space-time. What happens when time and space collapse and dimensions intersect? Descend into the shadow world to find out. These 20 picture cards can be combined almost infinitely. No matter how you place them, they magically fit together to form coherent scenes and offer you countless possibilities to create stories. —description from the publisher