Anna Boyd is jobless, again, but thanks to her best friend Suzanne she lands the position of house sitter for a wealthy but mysterious couple; the Carltons.
Charles Carlton has taken a lifetime to build up his empire. He and his wife now live in luxury and own the opulent 'Number One', a beautiful house where nothing is quite what it seems.
But why have they chosen Anna, who bears a remarkable resemblance to their errant daughter, Marianne, to look after their precious possessions?
On Anna's journey to find the truth she meets the lovable and bumbling Mabel, the irascible Huw and gorgeous Harry.
While Anna is trying to solve her problems Suzanne has some of her own.
Will Anna find the life she wants to lead, with the man of her dreams or will this house sitting job be her last?