More than a thousand years ago, the Danish warrior Stirbjorn the Brave led a campaign against King Harald Bluetooth. It is the Viking battlefields that hold the secret of the location of the Prong of Devotion, the final piece of the powerful artifact known as the Trident of Eden. The other two prongs, fear and faith, are already in the hands of the renegade Templar Isaiah, and if he collects all the parts of the Trident, he will become invincible. A temporary fragile truce between the Assassins and the Templars has been concluded, but will this be enough to get ahead of the enemy? In any case, the actions of Owen, Javier and the rest of the incredible alliance of teenagers will forever change the world of eternal enemies...