With the blood of another, Lucas can heal from any wound. And with every kill, his connection to the blood deepens. For there is power in the blood. A dangerous power that monsters covet and gods wish to destroy. When the System invaded, Lucas and the remaining survivors awoke to find themselves trapped at the top of a dungeon tower filled with deadly beasts. They are given just one year to battle their way to the end and escape before the tower self-destructs. For many, it won’t be enough time.