A sea between worlds

Twenty-four-year-old Cleopatra "Cleo" Jackson is a demigoddess and the daughter of Sally Jackson and Poseidon. When she is unexpectedly pulled from the Percy Jackson universe into the world of Record of Ragnarok, Valhalla mistakes her for a newborn because she has no history or record of existence in their reality.

Things become even stranger when the gods discover that generations of dormant divine bloodlines have converged within Cleo. Crossing universes causes those bloodlines to connect with their Record of Ragnarok counterparts-including Poseidon, who is somehow recognized as her biological father.

RoR Poseidon is furious and refuses to believe Cleo is his daughter, while Cleo insists she already has a father. But as more gods begin recognizing their own blood within her, Cleo becomes an impossible mystery that all of Valhalla wants answers to.

Now she must discover why she was brought to this world, what her awakening bloodlines mean, and how to get home-while Poseidon desperately tries to deny what even the sea already knows.