Meg Morrissey will not believe that her husband, James, committed suicide. A famous naturalist, James was in high spirits because he'd finally completed his autobiography. He didn't leave a suicide note. But even more suspiciously, the record of his life's achievement, his magnum opus, has gone missing.

Troubled, Meg calls in amateur sleuths George and Molly Palmer-Jones to investigate. The disappearance of the autobiography is highly suspicious, and George and Molly wonder whether the motive for the killing is to be found within its pages. Could the famous environmentalist have uncovered a secret so damaging someone was prepared to kill for it?