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