After ladies night at the Jockey, Fiona wakes up with soon-to-be married Joey Dawson. But she has no time to ponder her mistake when Liam is rushed to hospital after swallowing pills. It's not long before social services get involed, and to Fiona's horror, the social worker assessing the family turns out to be her school nemisis Katerina Webb, who is also the future Mrs Dawson. Meanwhile, Ian discovers Frank is not his biological father and sets off in search of a family he never knew existed. What will he find?