Ship designer Alan Moss' house burns down and all his work on revolutionary design concept for warships is destroyed. His plans had previously been rejected by the Admiralty and he was successfully going it alone until the fire. The EYES team join Moss on a sailing trip which goes wrong when the rudder breaks, but they manage to get safely back to shore. An explosion at Maggie's flat seems like another attempt to kill Moss and Maggie goes to the Admiralty where she meets Commander Hutchins, a supporter of Moss' designs.