Major Tom Cadnam is taking part in an exercise against an old rival who he later discovers has been having an affair with his wife whilst he's been in Northern Ireland.

A boxing competition causes divided loyalties amongst the men and their families and betting leaves some out of pocket.

In a fit of jealous rage, Fusilier Dave Tucker attacks an NCO and is court-martialled. Will he be discharged from the army, the only family he knows? Tucker's defending officer, Lieutenant Nick Pasco is forced to choose between the army and the woman he loves.

The men are sent on an exercise accompanied by a journalist who is the Lt. Col. Dan Fortune's new love interest but the exercise is suspended when a helicopter carrying the CO and the Padre crashes in woods.

A face from Corporal Paddy Garvey's past stirs up old resentments and shows a darker side to his personality causing Corporal Nancy Thorpe to question whether she wants to marry him.

As the regiment moves to Hong Kong everyone has trouble acclimatising to the new environment and climate. New Company Commander Lt. Alex Pereira decides he wants his company to be the best but it has dire consequences for everyone.

The desire to become Lance Corporals almost ends in disaster for David Tucker and Midnight Rawlings after they attend a local brothel. The CO has his own troubles when his wife takes refuge of the child of an illegal immigrant.

Paddy Garvey struggles to tell Dave Tucker his news until it's too late whilst Dave tries to woo back Donna. Complications during a live firing exercise results in a secret coming up to the surface.