From writer/director Joey Klein, the indie drama Castle in the Ground follows Henry (Alex Wolff), a teenager who’s also the caretaker of his chronically ill single mother (Neve Campbell) that he’s trying to nurse back to health while she’s more concerned about her stash of Oxycontin. When he befriends his troubled next-door neighbor (Imogen Poots), he finds himself falling deeper into the world of drug dependency at a time when opioid abuse runs rampant. During this 1-on-1 phone interview with Collider, actress Neve Campbell talked about tackling the important subject of opioid abuse, …