Hera directs Seraphim to the powerful sword Zeus once forged for Heron, who is enslaved aboard a galley. Alexia seeks counsel from her mentor, Chiron.

Zeus brings Heron to Olympus for training, angering the other gods. Alexia embarks on a mission to Melidoni with Heron's companions, Evios and Kofi.

Seraphim's loyalties are tested when Zeus reveals Hera's deceptions. Alexia's company crosses the Fields of the Dead. War breaks out between the gods.

Hera resurrects the giants of the sea and assails Olympus, leading to an earth-shattering battle for the ages and the rise of a new demigod: Heron.