Flooded England, 2216 - Lilly Melkun has outwitted the bloodthirsty Reavers, who prowl the waters that cover most of England - and escaped to Cambridge. But Lilly is far from safe, because still in her keeping is PSAI, the last hand-held computer in existence - a now malfunctioning treasure from the past. Inside the jewellike computer, is a sinister looking chip with an unknown purpose. Worse follows, when the professors of Cambridge plug it into an ancient mainframe computer setting in motion a fiery chain of events leading back to London. A false, anti-terrorist alert has been activated. Strange, out-of-control robots from a long-ago technological time, threaten to use 'maximum force' to control everything in their way. Once again, it's up to Lilly, Zeph and friends to save the world from burn