This story is a sequel to Percy Jackson: My once upon a time 3

The Vks and the Rainbooms return for a brand-new adventure, and Mal returns to the Isle of the Lost.

Uma resolves to talk to Sunset Shimmer, when they wrote to each other.

Sunset is involved in a sneaky plan that Uma and Harry Hook have, and she must decide if she will fight for her oldest friend, Uma, or fight for her family.