Matthew knows that this summer is going to be the worst ever. His best friend Kyle is gone, his younger brother Mark has surpassed him in size and athletic ability, and his mother is pregnant for the fifth time. The eldest home-schooled son of a preacher, Matthew plans to bury himself in books about the speed of light and Einstein's Theory of Relativity to see if he can prove his own theory about the dilation of time. Instead, he befriends Dinah, a homeless teenager seeking refuge at the library. Although from very different backgrounds, Matthew and Dinah come to realize that they have a great deal in common--their love for music and for cans of olives and potato chips found in a supermarket dumpster that are just past the sell-by date... and maybe even for each other. Matthew struggles with his feelings for his own family as he helps Dinah avoid Child Welfare. And in the process, Dinah helps him discover that even the smallest acts of kindness can make a very big difference.