Eleven-year-old Archie protects his little brother, Oggie, who is a skittish child always being bullied. With their parents divorced--the boys refer to their two homes as Saturn and Jupiter --the boys rely on each other for everything, so when Oggie`s wallet, stuffed with his savings, is stolen by a motley gang, Archie promises to retrieve it. The mess that follows involves a hold-up, a getaway car, and Archie`s musings on death and tragedy.