We meet the crew of Roughnecks as they head out to the Osprey Explorer oil rig off the coast of Scotland in the North Sea. There are two newcomers to the ranks; Hilary and Wilf aka Village. Later, another woman, Tessa joins the crew as longstanding mechanic Charlie dies of a heart attack having watched a porno

The crew visit a neighbouring rig for the annual quiz night. Pitted against Osprey's Ceefax is the arrogant Aussie know all, Joe 90 (Ben Mendelsohn). Meanwhile Tessa makes Charlie's widow's dreams come true...thanks to a little emotional blackmail on Drew. Cinders survival refresher means the Osprey is without a chef, but Village surprises everyone with his Italian cuisine.

Shore leave for the Roughnecks; Hilary decides to join Ian for some hillwalking but a mistake with the hotel booking means they must share a room. Tom's daughter Heather is getting very close to Chris, despite Tom's reservations, and there's heartache for Archie when he learns his estranged wife Jean may have been assaulted by her new man, Bob.

Chris and Heather return from Spain and announce their intention to marry. Tom is furious and lashes out at Chris, but their differences must be put aside as they head offshore. Ian's concerns over safety on the rig proves justified when a crisis develops and several of the crew are evacuated by helicopter. Just when the crisis seems to be averted, further disaster strikes...

Grief, trauma and suspicion lie in wake for the crew following the helicopter crash. The finger of blame points to Chris, as an investigation into the disaster gets underway, whilst Hilary takes the news of Ian's death hard. On the mainland, Chris and Heather tie the knot.