Narvel Roth (Joel Edgerton) is the meticulous horticulturist of Gracewood Gardens. He is as much devoted to tending the grounds of this historic estate, as he is pandering to his employer, the wealthy dowager Mrs. Haverhill (Sigourney Weaver). However, chaos enters Narvel's existence when Mrs. Haverhill demands that he takes on her wayward great-niece Maya (Quintessa Swindell) as a new apprentice, unlocking dark secrets from a buried violent past that threaten them all.