The manufacturer lance Gerero on the basis of irrefutable evidence accused of killing a girl. However, the young lawyer still hopes to expose the criminals involved in the fabrication of false evidence, saving their customers from competitors…

While doing their work on the deep underwater station two aquanauts discover strange mystery: it seems as if one of the aquanaut's girlfriend who recently died in a car crash had turned into a big manta fish. That manta writes words on the station's port-holes and tries to draw attention many other ways.