We have all put on figurative masks throughout our lives, depending on the situation we might find ourselves in at any given point. A Different Man uses a literal mask, but the point is no less pertinent. But the film, written and directed by Aaron Schimberg, suggests that pretending to be someone you’re not is ultimately a chore, and a decision that will come back to haunt you. But while the premise is thought-provoking, the execution leaves much to be desired. Oscillating between being darkly funny and thrilling, the tonal shifts and lack of feeling don’t work in its favor.