A tragic case of arson sends Sarah into hiding to escape the terrible fate of her family. She works as a common labourer, and is safe for 13 years, until she receives an ominous note. Despite her disguise, the killer has caught up with her, and she is once again in danger from a man determined to silence all echoes from the past.

William, an inquiry agent, is consumed with curiosity when he meets Sarah and hears about her case. And one look into her grey eyes has him hooked. Even though the evidence is scanty after so many years, he vows to assist her, unaware how events will challenge him both as a man of honour and as an investigator.