Fifteen-year-old Christopher has a photographic memory. He excels in math and grasps scientific concepts with ease. What he can't fathom, however, is the behavior of other people. When he finds his neighbor's dog, Wellington, dead on the lawn, he decides to track down the culprit and write a murder mystery about it. During his search, however, he uncovers other secrets that threaten to completely turn his world upside down.