Zak Gist and the young,inexperienced Tom Greening are angels,trained in the law and sent to Earth by their celestial boss Mr Mountjoy to defend the needy and innocent. They arrive in York and room with Mrs Sheringham,who tells them they must not get emotionally involved with their clients but are soon witness to a sniper attack on a wedding party,the wounded numbering Hannah,a woman Zak clearly knows and herself a lawyer. They are charged with defending the man with the rifle,Sean Yearling,sent to prison for drunk driving two years earlier on the evidence of then girlfriend Lucy,who just happens to be the bride.The prosecutor is also somebody known to Zak,Richard Pembroke - literally a fallen angel. Whilst Tom proves that Yearling could not have fired the shots his client's outbursts in court do not help and it is apparent that he is shielding somebody. However,in finding out the truth to get an acquittal it is Zak,who should know better,who is guilty of bending the rules and getting himself involved.
Elderly Mack Steen in accused of attempted murder after poisoning Keith Cedric,owner of the care home where he lives, by putting tablets in his drink. Bailed to Mts Sheringham's Mack is seen as a hero by fellow residents,especially his friend Joe,for taking on Cedric who plans to knock down the home and build another some distance away,scattering them. Zak however discovers a painful secret of Cedric's which explains his motives and saves the day. Mrs Sheringham though is unsettled by Tom's attraction to office temp Jude.
Gemma Manes,whose teenage son Paul was murdered a year earlier,is charged with the manslaughter of Mark Yalling,a stalker who entered her house. She is considered to be a local heroine and Tom,mystified that Mr Mountjoy wants him and Zak to prosecute and not defend Gemma,quits the case. Then Zak gets evidence to suggest that Gemma suspected Yalling of killing her son and was conducting a different agenda to avenge Paul. Once more he breaks the rules by intervening though this effects a bizarre happy ending. Meanwhile Hannah is intrigued that Zak knows so much about her but Mrs Sheringham,unhappy that Tom is seeing so much of office junior Jude,has the girl transferred.
Major John Parker asks Zak to represent Private Laura Pearson,charged with attempted desertion after supposedly wounding herself to avoid a tour of duty.Laura's colleague Sophie believes she was stabbed by obnoxious Sergeant Faber for spurning his advances. Zak,with Hannah as his junior, wins his case but not before he has rescued Tom from a minefield and revealed that in a previous life he was the Angel of Mons. Mrs Sheringham,meanwhile,finds romance with her late husband's friend Carl whilst Hannah accepts a date from the handsome major,to Zak's annoyance.
