When his beloved only daughter goes missing, millionaire entrepreneur Walter van Dam calls in a team of experts - including free-climbers, a geologist, a parapsychologist, even a medium - to find her . . . for Anna-Lena has disappeared somewhere within a mysterious cave system under the old house the family abandoned years ago.
But the rescuers are not the only people on her trail - and there are dangers in the underground labyrinth that no one could ever have foreseen.
In a gigantic cavern the team come across a number of strange doors, three of them marked with enigmatic symbols. Anna-Lena must be behind one of them - but time is running out and they need to choose, quickly. Anna-Lena is no longer the only person at risk.
They little expect door ? to take them back to the 1940s - but this is not the 1940s they know. In this timeline, Nazi Germany capitulated early, the US has taken control of Europe and is threatening the Russian-led Resistance with a nuclear strike. If the team is to rescue Anna-Lena - and survive themselves - they will have to stop this madness - at all costs!
DOORS: THREE DOORS, THREE DIFFERENT ADVENTURES. WHICH DOOR WILL YOU CHOOSE?
Keep up to date with related content where you see this icon.
Click to Watch and get regular updates… find out more