London, 1807. A city of gaslight, graveyards, and gathering shadows.
When a cryptic symbol is discovered etched into the bones of a madman, four unlikely companions are drawn into a mystery that stretches beyond the veil of reality. Among them: Elias Finch, an obsessed antiquarian with secrets of his own; Connie Grace, a sharp-tongued sharpshooter haunted by war; Lucien Bellamy, a gentleman spiritualist who’s seen too much; and Mabel Crane, a quiet woman marked by cosmic fate.
As eldritch horrors awaken and ancient gates begin to open, the group races to stop an invasion that defies time, nature, and sanity itself. But every portal demands a price—and one of them will not return.
A darkly humorous, emotionally charged tale of sacrifice, shadow, and survival, The Fifth Arch blends gothic horror with cosmic mystery in a 19th-century world on the brink of unraveling.