At the dawn of the modern era, Portuguese explorer Ferdinand Magellan leads an expedition under the Spanish crown in search of the first westward route to the Spice Islands. He embarks on a perilous journey across the uncharted Pacific, where his fleet faces starvation, mutiny, and the psychological toll of endless seas. Upon reaching the shores of Cebu, Magellan is pulled into a fatal conflict with the natives by his drive to spread Catholicism, culminating in his tragic doom.

Hayden Han is a grieving travel influencer with ten million followers and no one to call. With Christmas looming, he takes on a dodgy brand deal solely on the promise that it will take him far, far away from his lonesome home life--in this case, twenty-four hours on the white sand beaches of the Philippines. But Manila has its own plans for Hayden, and as day turns dusk (tagalog: silim) in the City of Sun, Hayden finds himself pulled into a roiling high-speed chase that brings him face-to-face with the man he's becoming.