It is very hard to review this film without spoiling the plot but I will try my best. A group of very different people receive individual invitations to a dinner hosted by a genius. They all eventually decide to go, to find on arrival that their host is missing. Soon after dinner, they find that they have to solve problems against the clock. If they fail to do so, something nasty happens. What is the reason for this ? What is the connection between the characters. Can they solve the problems in time? All is revealed eventually, with great twists and turns that keep you guessing. If it sounds a bit like an Agatha Christie play, you are not a million miles away. However, it is crisper, better plotted, and better acted than most of hers will ever be. One for fans of World Cinema and mystery thrillers, none of whom should be disappointed by this Spanish mini-classic.