Seventy-nine year old Dame Lettie Colson begins to receive anonymous phone calls from a man whose message is, "Remember, you must die." Soon, her octogenarian brother, her senile sister-in-law, and many of their tottery friends begin to receive similar phone messages.

The novel takes us through a year or so in the lives of this group of eccentric elderly upper-class Brits and a few of their not-so-privileged servants and caretakers. As they pursue the source of the "memento mori" message, we discover a complex matrix of infidelity and deception, ranging from youthful love affairs and harmless perversions to manipulation and blackmail. In the end, though, Death will not be denied.