Centuries ago a powerful vampire hunter devised an artifact to safeguard humanity from the evil of vampires by imprisoning their vile souls within it. After his death the artifact was hidden to prevent the evil it contained from infecting the world. Now Dorian, an ancient vampire, has learned the secret to unlocking the artifact and harnessing the evil energy trapped inside for his own malevolent ends. All that stands between Dorian and unlimited power is Alexander, a reformed vampire and guardian of the artifact. To aid in his cause Alexander must gather the descendants of a powerful line of vampire hunters. Together they must protect the artifact and thwart Dorian's insidious plans. Before they can save the world, the unlikely band of heroes must first accept who they are and learn to harness the power that has been passed down through their family lines. Can they set aside their petty differences and come together to stop Dorian from plunging the world into darkness or will their own internal struggles lead to humanity's downfall? Will Dorian and his minions prevail or will they regret having crossed... The Line?