Mary Fawcett refines the healing recipes she’s inherited from generations of women before her—an uncanny and moral calling to empathize with the sick. When witchfinder Matthew Hopkins arrives in her small village, stoking the fires of hate, he sees not healing but the devil at work. Mary’s benevolent skills have now cast her and her young brother under suspicion of witchery. Soon, the husband of one of Mary’s patients is found murdered, his body carved with strange symbols.

Shesheshen is a shapeshifter, who happily resides as an amorphous lump at the bottom of a ruined manor. When her rest is interrupted by hunters intent on murdering her, she constructs a body using a metal chain for a backbone, borrowed bones for limbs, and a bear trap as an extra mouth. However, the hunters chase Shesheshen out of her home and off a cliff. Badly hurt, she's found and nursed back to health by Homily, a warmhearted human, who has mistaken Shesheshen as a fellow human

As a Gracekeeper, Callanish administers shoreside burials, laying the dead to their final resting place deep in the depths of the ocean. Alone on her island, she has exiled herself to a life of tending watery graves as penance for a long-ago mistake that still haunts her. Meanwhile, North works as a circus performer with the Excalibur, a floating troupe of acrobats, clowns, dancers, and trainers who sail from one archipelago to the next, entertaining in exchange for sustenance.

Emery Blackwood’s life changed forever the night her best friend was found dead and the love of her life, August Salt, was accused of murdering her. Years later, she is doing what her teenage self swore she never would: living a quiet existence on the misty, remote shores of Saoirse Island and running the family’s business, Blackwood’s Tea Shoppe Herbal Tonics & Tea Leaf Readings. But when the island, rooted in folklore and magic, begins to show signs of strange happenings, Emery knows that something is coming.

Leah is changed. Months earlier, she left for a routine expedition, only this time her submarine sank to the sea floor. When she finally surfaces and returns home, her wife Miri knows that something is wrong. Barely eating and lost in her thoughts, Leah rotates between rooms in their apartment, running the taps morning and night. As Miri searches for answers, desperate to understand what happened below the water, she must face the possibility that the woman she loves is slipping from her grasp.