The story is almost cinematic: Looking for a missing friend of main character discovers a sunken area with all sorts of fantastic and incredible places and characters and covers their eerie mystery.
It works through neverending puzzles and hidden objects to discover the secret of the mysterious power that prevails here and save the missing friend and the inhabitants of the underwater city.
The game has 3 levels of difficulty: easy, normal and hard. The story is all the same, the difficulty levels are different by the given in-game assistance.
Depending on this, of course, is also the Time. On Easy it took me about 6 hours to power once the complete story. Without one or the other used to do that would have certainly lasted a whole hour longer. In itself, this season's okay, but is not in proportion to the price of the game, unfortunately, a bad habit of G5. However, I was lucky enough to get for free as part of an Amazon-action game, so I can deduct here no point ;-)
All in all, from me a recommendation, even if one can measure not discounted.