The two embark on a cross-country road trip in Rube's rented PT Cruiser to find and talk with their father, and pick up along the way two additional half-siblings who their dad also left, college basketball star Pep and fifth-grader Tom. The story features an entertaining romp from the farm in Tennessee to Oklahoma, Pep's NCAA tournament game in Austin, Salt Lake City, and finally Woodside, California. The four half-siblings meet their now seventy-year-old father and his newest child, two-year-old Rooster.
The relationship between Mad, Rube, Pep, and Tom grows each step of the way across the country, with them protecting each other and there for one another. Tom is described as having gone from feeling like he all alone, orphaned by his father, to having three siblings with him, and then a fourth in young Rooster.
It's not obvious in the beginning of the book that it's going to be about the connections made, but that gradually takes shape and is revealed through the story told well by Wilson.