Fan Casting Mythological Game

After a garage sale, the members of a family buy a strange box that seems very old and comes from Greece. During an eventful evening, one of the children manages to decipher the particular mechanism of the box, opening it at once and absorbing all its members to take them to a wild and remote area ! They realize that they're in a remote corner of Ancient Greece, at the time when the Roman Empire begin his invasion, and curiously understand everything that has been said to them, as if the foreigners they meet speak their language. However, despite the bandits, Romans and other shady peoples, nothing is more dangerous around here than some very well-known mythological monsters, very real and members of the same family, who seem to be looking for something precious they have without knowing. Family members will have to help each other more than ever and learn to build alliances, while trying to understand how this game works, if they hope to return home. However, they'll learn that the real "monsters" are not always those who seem like them...