Eighth-grader Tony Isidoro follows a trail of environmental clues to try and figure out what ecological imbalances might have caused the death of the town's best-known robin.
Ten-year-old Kim's longed-for visit with her cousin Mia is already going badly when the kitten Kim finds in the back yard is attacked by Mia's pedigreed Persian, but the discovery of a robins' nest draws the girls together.