Concerning the past, present, and future of the Patron Saint of Head Trauma. Linear time may just be a scam, however. Mackenzie is not your usual lady-of-the-night. She doesn't use whips or chains. She won't be caught dead in leather. Do you know how badly leather sweats? A gifted Muay Thai fighter coming off a devastating loss, she makes way more money doling out pain to others with the time-dilating aids of a six-sided chamber of flashing screens and lights, blistering music, and a pair of night-vision goggles. String-theory straight rights and space-time spinning backfists, then a kiss. There are techniques for hurting and there are techniques for healing. They often coincide. Things are looking up. She has 401(k) and medical. Redemption is within reach. Love, a possibility. But memories of a severe mother resurface. Binge-eating becomes her BFF. Ah, those pesky carbs. A hypercube is a four-dimensional extrapolation of a cube. It moves in all directions through time and space. Anything that can happen already has or will. Don't call it a cop-out. Call it causality.