Dash Blathwayt, Viscount Dyrham, hates surprises. 

Dash prides himself on order and control. His meticulously planned annual hunting party at Dyrham Park was supposed to go off without a hitch. But when he awoke to a peculiar white cloud drifting across the horizon, he had no idea it would herald a storm of events that would upend his entire life.  

A locket that is a key to Dia's past.

Miss Dia Daywater, raised in a French orphanage but groomed in the ways of the English aristocracy, never imagined that a simple journey to Bath with her young ward would lead to danger. When her enigmatic locket attracts the wrong kind of attention, Dia finds herself fleeing through the shadowed forest straight onto the grounds of Dyrham Park and into the arms of its enigmatic master.  Can Dia resist the growing connection between them? She knows all too well that a governess has no place in the heart or the life of a viscount.  

Book Four in the A-Z of Romance: Regency Raven Seal series. This is a standalone story, but there are some connections to the other novels.