​Vincent has an unusual occupation: his discovery of an odourless, tasteless, all natural poison which causes a painless suicide has turned him into a professional suicide merchant. When he is contacted by Walter Bryce, he arrives at the Bryces’ country house and mistakenly assumes that his product was intended for Walter’s consumption. It becomes clear that Walter’s wife Celia is the client – or is she? Why are all her suicide letters typed and unsigned? A Samaritan agrees to make a house call on the Bryces, but after talking to Vincent, even his faith in this “wonderful world” is shaken. After several thwarted attempts to poison various characters (resulting in multiple poisonings of a rubber plant), will anyone actually manage to drink the poison? This is black comedy at its blackest and best.