Step through the doorway and into the dangerous streets of Elizabethan London! Biff, Wilf, and Kipper are older now, and they are facing their most thrilling mission yet. They must track down the evil Virans who are determined to change the course of history forever. As the children explore the bustling city from centuries past, they run into the Virans in a place they would never expect. Time is ticking, and the fate of the world rests entirely in their hands. They will need all their courage, quick thinking, and a few cool historical gadgets to outsmart their enemies. This exciting chapter book takes you on a fast-paced journey through real historical events. You will discover fascinating facts about the past while racing alongside your favorite characters to save the timeline from total disaster.