A fateful mistake... When Elinor Rochdale boards the wrong coach, she ends up not at her prospective employer's home but at the estate of Eustace Cheviot, a dissipated and ruined young man on the verge of death. A momentous decision... His cousin, Mr Ned Carlyon, persuades Elinor to marry Eustace as a simple business arrangement. By morning, Elinor is a rich widow, but finds herself embroiled with an international spy ring, housebreakers, uninvited guests, and murder. And Mr Carlyon won't let her leave ...