A young historian, Alex, discovers a hidden chamber in an ancient library containing a mystical artifact that grants the ability to travel through time. He embarks on a series of clandestine trips to witness pivotal historical events, but his actions inadvertently create a ripple effect, leading to unintended consequences that threaten the very existence of humanity. He must confront the moral implications of his actions and choose between saving the future or upholding the sanctity of history.