The Probability of Miracles revolves around dry, sarcastic, 16-year-old Cam Cooper who has spent the last seven years in and out hospitals. The last thing she wants to do in the short life she has left is move 1,500 miles away to Promise, Maine, a place known for the miraculous events that occur there. But it's undeniable that strange things happen in Promise: everlasting sunsets; purple dandelions; flamingoes in the frigid Atlantic; an elusive boy named Asher; and finally, a mysterious envelope containing a list of things for Cam to do before she dies. As Cam checks each item off the list, she finally learns to believe — in love, in herself, and even in miracles.