Billy and Pete look after the general store while Mr Davis is at a curling tournament. Big George Thundercloud and his son Duke come by on their way home to the wild rice harvest. Pete tactfully informs Big George that he has a past due bill of over $300 and cannot get further credit. George takes exception to Pete's reminder, pays the bill and abruptly leaves. Meanwhile Billy had seen Duke steal some tins of salmon and a few apples but Pete offers to pay for them. Later Billy and Pete learn that the salmon from the store is contaminated and they set out to find George and Duke in the bush before disaster strikes.