When thousands of Viking warriors descend on medieval Paris, Dak is captured and forced to work with the invaders while Sera and Riq defend the city, a situation that places them on opposing sides.
Friends Dak, Sera, and Riq use the infinity ring to travel in time to medieval Paris where Viking warriors are attacking the Parisians. While Sera and Riq are defending Paris, Dak is captured and forced to fight with the Vikings.
As thousands of Viking warriors attack Paris, Sera, Riq, and all the people of the city struggle to defend themselves and Dak remains a prisoner, forced to work for the invading army.
