Tiboonda schoolteacher John Grant is en route from the tiny outback town to Sydney for summer holidays when he stops over in the mining community of Bundayabba. Drawn into “the Yabba’s” world of drinking and gambling, he drinks too much and loses all his money in a game of two-up. He misses his plane and the next day he is befriended by jovial Tim Hynes and his mates Dick, Joe and the inscrutable Doc.