When a Sun God makes a prophecy, it's best to heed the warning. Katherine stands on the edge of ruin. With Ragnarok in full swing and her friends off finding their own lives she can't find a purpose in her existence. When Baldir, their missing Sun God, kidnaps Katherine and entreats her to care for his friend, a wounded hellhound, Katherine makes a selfish choice for the first time in her life. Arwan never expected to meet a God, let alone fight a group of them to begin the Apocalypse. After the battle between Bianca, the Horseman of Conquest, and Hel, the Goddess of the Underworld, Arwan, escapes home to the Welsh coast intent to die on his own land. With Hel dead, the Horseman believe they've stalled Ragnarok. But Baldir has a dream that ignites the Horseman to take out the remaining hounds loyal to Hel, which includes the incapacitated Arwan. Can Katherine go against her friends to save a man she promised to protect? Even if Arwan could end the Horseman for good?