For generations, the coastal kingdom of Phimild has been plagued with waters infested with sirens. The viscious aquatic demigods armed with a song to bewitch the mind and strength to sink ships have a taste for human flesh and a tendency to fiercely protect their territory. With a dependency on the sea and a desperation to survive, a blood sacrifice was born to make an offering to sate the cravings of the aquatic monsters every few moons in an effort to protect their ships in between.

When a young woman finds herself shackled and out to sea, bound for a watery grave and a gruesome demise at the hands of demons said to prefer their meals with their hearts still beating, she is suddenly faced with the brutal reality of a barbaric tradition and the horrible truth of the sirens of the deep who rule the waters around her former home. But tensions are brewing on the shores and beneath the waves, and her sacrifice may just turn the tide and threaten to reignite the war that bled the waters red generations before.