Elderly mining magnate Michael Carmichael has died, leaving behind one of the great Terrible Wills of Fiction in which money is bequeathed to various relatives in reparation for indignities endured on his behalf or at his hands. But the heirs so-named, gathered in Carmichael’s home as directed in his will, not only deny these claims but also can’t seem to agree on who the man was to each of them — uncle, great-uncle, maybe a cousin of some hue or stripe — and investigator Mary Carner, brought along by pulchitrudinous shopgirl Veronica Carmichael, suspects that something fishy is going on. And then rising flood waters force everyone to stay the night. Cue chaos.