“People are bullets, fired,” the narrator declares in one of the wild, searching stories that make up Greg Jackson's Prodigals. A filmmaker escapes New York, accompanied by a woman who may be his therapist, as a violent storm bears down. A lawyer in the throes of divorce seeks refuge at her seaside cottage only to find a vagrant girl living in it. A dilettantish banker sees his ambitions laid bare when he comes under the influence of two strange sisters. A group of friends gathers in the California desert for one last bacchanal, and a journalist finds his visit to the French country home of a former tennis star taking a deeply unnerving turn. Strivers, misfits, and children of...