The Lazarus Effect sticks to using predominantly one small room as its home for horror. It focuses in on a tight-knit group of scientists who are researching and performing controlled experiments involving the resuscitation of freshly deceased lifeforms. The process is comprised of injecting a specially designed serum directly into the brain of the subject with a robotic arm equipped with a large needle. The group manages to bring an animal back to life but when a wrench is thrown into the gears and their progress is obstructed they end up rushing through another experiment. This leaves a scientist mortally wounded and the survivors with moral quandaries: should they bring them back and if they do, will they ever be the same?