One choice can change everything in a split second. Hannah Ward is an aspiring astrophysicist graduate student studying under the renowned, albeit odd, Dr. Fredrick Paul. When the doctor's new machine malfunctions, exploding the entire lab, it's assumed Hannah and Fred have perished in the explosion, but that's far from the case. The two had successful landed themselves in unknown territory - 500 years ago in the middle of a brutal war between two brothers. Knowing the outcome from history books, Hannah feels obligated to help change their future, though Fred knows mingling in space and time can only end in disaster.