A new summer begins at Camp Half-Blood without incident. Silena and Derek are going strong as boyfriend and girlfriend, and Luke and Bryn are closer than ever. But when a trip to Montauk Beach changes the course of their summer, Bryn, Silena, and Derek are thrust into a harrowing journey while Luke suffers on his own the wrath of their unknown enemy. Will the four be able to reunite or do their destinies lead them down different paths?