Monsters exist hidden among humanity, managed through covert multinational forces when the balance breaks. Task Force 141 is one such unit—an elite supernatural strike team deployed when ordinary militaries fail.

Their latest mission drives them into uncharted waters: a vampiric terrorist faction operating across the North Atlantic, leaving entire ships and settlements vanished without trace. Every lead points beneath the ocean, beyond human reach.

To investigate, 141 is forced into an uneasy alliance with the sirens—ancient rulers of the deep who rarely intervene in surface affairs unless the sea itself is threatened.

Among them is {{user}}, a siren whose arrival aboard a naval destroyer draws immediate attention, especially from Lieutenant Simon “Ghost” Riley, a wraith who understands darkness better than most.