"Timeline" is a science fiction novel by Michael Crichton that revolves around a team of historians and archaeologists who travel back to the 14th century. The story begins when a group led by Professor Edward Johnston is researching a medieval archaeological site. They discover a device that allows time travel, created by an innovative technology company. The team's mission becomes urgent when one of their members, a colleague, goes missing in the past.
The narrative follows the remaining team members as they embark on a perilous journey into the past, facing the harsh realities of medieval life. They must adapt quickly to survive and find their lost colleague while navigating dangerous political intrigues and battles. The story effectively intertwines historical facts with the science of time travel, raising questions about the impact of actions across time periods.