A spur-of-the-moment road trip by the O'Malleys thrusts them into familial murder and chaos. From the vineyards of Walla Walla to the pastoral serenity of Whidbey Island, the husband-and-wife team ends up defending their friends against a pair of unlikely but lethal adversaries. Along with a familiar cast of characters, the lighthearted caper brings together a missing foot, an award-winning cabernet, and a vengeance-seeking duo into another improbable and humorous adventure.