It seems that this summer the four inseparable friends had the chance to combine business with pleasure. Young archaeologists spend their holidays in a land where once treacherous and cruel sea robbers lured defenseless ships into a trap, and the remains of one of them still rise above the surface of the sea. Burning with impatience, the guys set off to explore the ancient wreckage, and it’s then that the sea unleashes a whole barrage of ancient, sinister secrets on the fearless four. As if by the will of unknown forces, the sun goes out in the sky, a heartbreaking scream tears through the air, and finally, a terrible black mask appears out of nowhere...