Landreth (defendant) entered into a contract for the purchase of commercial real estate from Clay (plaintiff). Both parties understood that Landreth intended to purchase the property for the purpose of constructing a refrigerated storage facility. After the purchase agreement was executed, the city rezoned the property and restricted its use to purely residential purposes. After the property was rezoned, Landreth refused to go forward with the purchase. Clay filed suit demanding specific performance by Landreth. The trial court denied Clay’s claim. Clay appealed.