If a game primarily tries to sell its technical merits, its plot is quickly pushed on the back bench in the development phase. That is probably why this part of the Freescape series (a series known for its free-movement three-dimensional graphics) sends the player on the standard quest of the standard quests: The player takes over the role of either a prince or a princess whose respective counterpart twin has been captured by a magician. The player enters the baddies' castle on a rescue mission, but before he or she can enter the actual dungeon, he or she has to find ten items spread all around the castle.
The polygonial surroundings are a little more detailed than in earlier games (in the stables, you'll find a horse, in the barn, there's a dung fork and so on), but it's also slower. The game is well playable on a standard A500, but a faster CPU definitely pays off.
Gameplay-wise, there are a few encounters with ghosts and monsters which can be taken out by throwing rocks and who will eat at the player's energy bar before that happens. Food regenerates this life energy. The main task is finding one's way through the castle, though. Basic mapping skills are a definitive requirement. Along the way, there are also a few simple puzzles.
In the end, none of this is really exciting, though. It's nice to roam the corridors, to search the rooms and to find secret passages, but on the whole, not much is happening. That's the curse of these 'technical marvel' games: They don't age that well. Although the game's graphics are good enough, they simply aren't impressive anymore for obvious reasons. If you are into this genre, you won't be disappointed, but other than the historical importance, there isn't much of an incentive for anyone else to try the game.