“Lifechanger” (*1/2 out of four) was an almost completely incoherent melodrama about a murderous shape-shifter (Jack Foley) who sets out on a mission to make things right with the woman (Lora Burke) with whom he loves. Terminally weird story changes its tone from sentimental to serious to violent with no rhyme or reason and winds up oppressive and aloof. In desperate need of some likeable characters and a cohesive script.