The residents of the small Suffolk town of Market Wetherby await the arrival of a group of yanks, the Eight Air Force 525 th Bomb Group. The older residents are wary but the young girls of the town can't wait to get to know the airmen better.

Danny is in hospital critical condition. Major Kiley and local bigwig Helen Dereham cross swords when Letty accuses one of the girls of assault.

Letty tells her brother she is pregnant but tragedy awaits her when her G.I. boyfriend Harvey is killed whilst on a mission.

major Kiley is ordered to get into the the good books of Helen Dereham and soon finds himself charming the locals at a dinner party. Mario is getting in deep with Sid the spiv and M/Sgt Mac McGraw is getting friendly with the married Sally Bilton. Meanwhile relations between the yanks and the English soldiers are getting increasingly fractious.

Even with her husband home and a wheelchair bould cripple following a direct hit on his tank, Helen Dereham is finding it difficult to disguise her feelings for Major Kiley. Sally's husband has been apparently killed and Mac offer her his shoulder to cry on. Meanwhile at an independence Day dance the American and English soldiers kiss and make up.

The Americans have been suffering heavy losses but some of the boys take a trip to London to recuperate. Kiley and Helen take the final step towards an affair and Sid is in deep trouble.

Vi and Chuck get married but their happiness is short lived when on Chuck's next mission his plane is hit, Chuck is forced to bail out over Germany and Marino is killed.

Pat Dereham tells her father that her mother is having a affair with Major Kiley. Stan Bilton has walked out on Sally but Mac is unsure whether to restart their affair.

Peter Mundy will soon be old enough to join up but his father would sooner be the one to go Elmer bets new boy Billy that he won't make it with Rosie. Major Kiley has agreed with Ronald Dereham that he won't see Helen again.

Vi thinks she may be pregnant, Sgt Billy Colvero may have to be sent home to America after the authorities discover he is only sixteen but Elmer arranges to sneak Rosie into the base for one last meeting. Meanwhile Peter Mundy joins up.

After taking part in a mission Jim Kiley has been shot and his life hangs in the balance. Stan Bilton has been killed killed on active service and his mother blames Mac and Sally. Meanwhile Elmer and Hymie get Peter drunk on a night out.

Kiley tells Helen that after the war is over he wants to marry her; Peter officially joins the army after turning eighteen, Stan Bilton's mother kidnaps Sally's children Betty and William but Mac comes to the rescue. Letty goes into premature labour following an argument with her mother while after a gap of two months Chuck Ericson turns up alive and well.