Mae'r Sarjant-Major yn cario tlysau gydag ef: bawen mwnci melltigedig a gafodd dramor. Cafodd ei felltithio gan hen fakir a gall roi tri dymuniad i'r perchennog. Er eu rhybuddio i gyd o'r cwymp a ddigwyddodd i bawb a fynnai, mae'r teulu Gwyn yn ystyried cymryd eu siawns.
Ai hud ydyw? Melltith? Neu gyd-ddigwyddiad pur?
The Sergeant-Major carries with him a trinket: a cursed monkey's paw that he acquired overseas. It was cursed by an old fakir and can grant the owner three wishes. Despite warning them all of the downfall that befell all those who wished upon it, the White family contemplate taking their chances.
Is it magic? A curse? Or pure coincidence?