As a servant below stairs at the big manor house, Rose dreams of running her own teashop one day, and carefully saves a few shillings each week from the money she sends back home to her mother.

But on her next visit home to see her family, Rose is shocked to discover that their savings have disappeared, and her headstrong sister Daisy is keeping secrets.

Discovering that a poisonous menace has taken root in their happy family, Rose feels powerless to stop it. Can she save them from disaster, before they lose everything?