When Karla brings her father Hans to a clinic in Mallorca because he was stung by a bee, it does not look good for him. The doctors insist that he suffered a normal bee sting, but Karla is convinced otherwise. Together with the researcher Ben she sets out to find the real cause of her father's condition. They find oversized bees, which are also extremely aggressive. This new insect species is a major threat to thousands of people on the holiday island.