Junior detectives, Peter and Gracie enlist the help of their parents to find Grandpas missing vintage car. Grandpa, a returned serviceman, has spent his life helping others. His grand- children decide it's time to repay Grandpa for all his kindness. They search the Victorian country town of Ballarat for the Pontiac, restore it to its former glory and present it to Grandpa for the upcoming Anzac Day march.