For five years, 17-year-old Oscar has never been without his dog, Mr. Cigar. The two have made a pretty good life for themselves in North Texas, though Oscar's older sister, Rachel fled after Mr. Cigar bit off her left hand. Oscar knows his beloved pet is no menace. Mr. Cigar is a supernatural companion. After years of silence, Rachel calls out of the blue. She's being held hostage and will only be released if she pays a debt she owes. The truth of Rachel's circumstances ultimately uncovers the truth of Oscar's own... and the truth about Mr. Cigar.