After Jax receives nine missed calls from her sister, Lexie, she assumes that it's just another one of her sister's manic episodes. But the next day, Lexie is dead: drowned in the pool at their grandmother's estate. Jax discovers that Lexie was researching the history of their family, and that the land holds a dark secret. On a 1929 trip to Vermont, newlywed Ethel Monroe is enchanted by a natural spring. Ethel learns that the water is rumored to grant wishes, never suspecting that the spring takes in equal measure to what it gives.