Based on the Wendy Wunder novel of the same name, 'The Probability of Miracles' follows Campbell “Cam” Cooper, an irreverent cynic, who has been suffering from neuroblastoma since she was 8 years old. After receiving an “expiration date” from her doctor, Cam’s mother uproots their family to a town called Promise in the hope that a miracle may save Cam’s life. While Cam doesn’t believe in magic or miracles, she goes along for the ride and plans to try to do some normal teenage hijinks with her final summer on earth…but life and Promise have something very different in mind for her.