Chloe, Serena, and Xinot, the Fates, live on a secluded island spinning, measuring, and cutting the threads of human life but when Aglaia, a mortal, finds them Chloe must try to keep her sisters from getting attached to the girl and involved in her dark fate that could unravel the world.

Nico, the son of Hades, and his boyfriend Will, the son of Apollo, travel to Tartarus, the deepest, darkest part of the Underworld as they attempt to rescue an old friend. As the son of Hades, Nico di Angelo has been through so much, from the premature deaths of his mother and sister, to being outed against his will, to losing his friend Jason during the trials of Apollo. But there is a ray of sunshine in his life-literally: his boyfriend, Will Solace,...