PC Smith and PC Rickman deal with a disturbance at a registry office, and DC Proctor and DC Holmes discover an ingenious immigration scam in which British lookalikes of Romanian illegals marry Irish women to gain UK residency. Smith and Rickman follow up a case of forged speeding tickets, and come across a mail holding centre run by Colin Briggs at his garden centre, where they discover a stash of Romanian passports. Undercover at the registry office, CID and Immigration arrest the 'Romanian Godfather', Ion Goga, behind the scam and his wife, Sheila Devlin.