As described on the box:
It's the last day of your $599 London vacation. Unfortunately, it's also the first day of World War III. Only seconds remain before an H-bomb vaporizes the city... and you with it. Unless you escape to another time, another dimension.
For every atomic explosion unlocks the door to a secret universe; a plane between fantasy and reality, filled with curious artifacts and governed by its own mischievous logic. You'll criscross time and space as you explore this fascinating universe, learning to control its inexorable power.
Trinity leads you an a journey back to the dawn of the atomic age... and puts the course of history in your hands.