The story unfolds on the Italian ocean liner Antonia Graza in May 1962, where a group of affluent passengers revels in the elegant ballroom, as a stunning Italian singer serenades them with "Senza Fine." However, beneath the glamour lies malevolence. In a secluded area of the ship, a sinister gloved hand activates a concealed switch, unleashing a wicked wire that swiftly slices through the dance floor, shocking the celebrants in a horrific twist of fate. Among the chaos, only a young girl named Katie is spared from this gruesome demise, thanks to her small size and the protective stance of the ship's Captain. As she gazes up at him, horror unfolds when his face grotesquely splits, leading Katie to scream in terror just before the scene shifts to the present.
Fast forward to modern times, a salvage crew retrieves a mysterious vessel adrift in the Bering Sea, which they soon discover is the Antonia Graza—a luxury liner long thought lost. During their celebration at a local bar, the crew meets Jack Ferriman, a Canadian Air Force pilot who entices them with tales of this ghost ship, promising fortune for those who can haul it back to port. Setting sail on the Arctic Warrior, they board the eerie ship, only to encounter unsettling phenomena.
As strange occurrences unfold—a spectral little girl, eerie melodies, and the grim discoveries of previous salvagers' corpses—the crew becomes increasingly uneasy. They decide to salvage some hidden gold but soon face catastrophic peril when their tugboat explodes, leaving them stranded aboard the haunting ship. Frantic to return to safety, they attempt to repair the Antonia Graza while unraveling its chilling secrets: evidence of violence and betrayal suggests the crew turned on the passengers as they sought to claim the ship's treasure.
Among revelations is Katie, now a ghostly presence, who guides Maureen Epps through the events of that fateful night. It becomes clear that a horrifying massacre unfolded as crew members murdered guests after poisoning their food—a horrifying plan to claim the ship's gold. Spectacles of the past unfold; the crew resorts to shooting passengers and mauling one another over greed until chaos reigns supreme.
At the story’s climax, Francesca, a bewitching singer in red satin, meets her grisly end at the hands of a betraying crewmate, culminating in the uncovering of Jack Ferriman as the orchestrator of this malevolent massacre—a spirit who forges eternal chaos. In an attempt to escape his grasp, Epps resolves to destroy the ship.
What follows is a fierce confrontation where Epps confronts Ferriman, who reveals his chilling role as a soul collector for dark forces. As the ship detonates, Epps barely escapes, witnessing the escape of trapped souls—including Katie, who gratefully acknowledges her freedom.
After being rescued by a cruise ship, the film concludes with a heart-pounding moment: as Epps recovers, she looks through the ambulance doors to see the gold being transported by her former crew, with Ferriman ominously returning to haunt her. The chilling image solidifies the dark legacy of the Antonia Graza as the screen fades to black, leaving a lingering sense of dread and unanswered questions.
