The D.I.C.E. team is on the planet Gowron on a mission to recover a shuttle that lost control on launched and plunged to the bottom of the sea. Only Marco and his Monocrawler can withstand the pressures at those great depths. But he soon discovers he is not alone down there. Furthermore, a secret agent from enemy planet Deeras reveals that the cargo is not what D.I.C.E. was led to believe.