The mysterious world map on Freddie Malone's bedroom wall ripples into life and the swirling vortex begins to form but is Freddie prepared for where - and when - it will take him? Join Freddie Connor and Ruby as they travel to the plague-stricken and fire-ravaged London of the seventeenth century where the streets are ruled by a merciless gang of criminals and kidnappers. Stalked through time by the menacing shrouded figure of the Collector can the friends outwit their enemies and save history? It's all just a question of time...