When their mother goes missing in Spirit Lake, three half-sisters travel home to settle her affairs. The youngest sister, June, a documentary filmmaker, captures their bittersweet homecoming. As they settle back into her house, Isa takes up with June';;;s ex-crush Josh while several strange occurrences happen after they jokingly summon the ghost of a local legend. As the questions mount, the family begins to unravel and June finds herself drawn deeper into the true mystery of the lake..