Don't Ask, Don't Follow

Beth Ralston, a paralegal in Portland, Oregon, would rather be racking up billable hours than mingling at an office party—especially when her sister Lindsay, aka her plus one, is a no-show. After making her obligatory rounds, Beth returns to her office to find that her boss, who she’d talked with moments before, has been murdered. She sees a woman fleeing the scene.

Wait—was that Lindsay? Unable to catch up to her in time, Beth waits for the police to arrive and notices that Lindsay has left...