An exclusive hotel on a little picturesque island seems to be the perfect retreat from your stresses of criminal detection for Hercule Poirot. But with the appearance of the stunning Arlena Stuart, the peaceful and relaxing atmosphere becomes billed with an indefinable erotic stress. And when she is discovered viciously strangled inside a secluded cove, a couple of few, especially among the women, who appear to feel either shock or repent. As Poirot comes after a twisting route of bizarre and bewildering signs, his only certainties are that the perfect solution is lies within Arlena herself, and that there is evil beneath the sunlight. John Moffat as Hercule Poirot mind an all-star solid which includes Iain Glen, Fiona Fullerton, Robin Ellis, Wendy Craig, George Baker and Joan Littlewood.