The only redhead in a sea of blondes, Abby Anderson spent her childhood waiting for her 'real' parents to show up. A news story about two women finding out they were switched at birth sparks a theory - she must have been switched too.

When Abby's parents announce a family holiday to Fiji, she's not sure she'll survive the week with her five so-called siblings and their partners. But with her wedding around the corner, the holiday is the perfect opportunity to implement her plan. Abby's going to find out, once and for all, if she really is an Anderson.