Santiago Suarez is a man who craves challenge, a knight errant, if you will, whose exploits are in the realm of the intellectual and artistic. His wife, Bonnie, has been his game companion and adventurer in kind since they met in college in the late ’60s. Three years ago they set out on a quest to downsize from their converted raised ranch in Greenwich, Connecticut, which, with their three sons grown and gone, had become too empty feeling.