Human girl Aria accidentally swallows a mysterious "Tear of the Sea God" and is dragged into the deep sea, waking up inside the brutal "Abyss Academy." As the only "scaleless one" (human) there, she instantly becomes prey for every deep-sea predator. To survive, the Great White Shark King forcibly assigns her as a roommate to the academy's three most dangerous Alphas—the savage great white shark Ryker, the deadly glowing jellyfish Silas, and the dolphin Callum, who possesses a healing sonic voice. As the deep sea's "Red Tide" (mating season) arrives, the three top predators fall into a frenzy of obsession over Aria's scent. Amidst deadly abyssal currents, the scheming of the power-hungry frost aristocrat Blair, and the tyrant king's conspiracy to erase the mermaid bloodline, the hidden "Mermaid Queen" bloodline within Aria begins to awaken. She will no longer be prey, but the true master of this deep sea—and she won't let go of a single one of her three Alphas.
