Cornwall, 1783. Ross Poldark returns from the battlefield to find his father dead.

Ross plans to reopen his family mine with Francis. Demelza struggles to fit in at Nampara.

Rumours spread of a scandalous relationship between Ross and Demelza.

News of Ross and Demelza's marriage spreads, damaging Wheal Leisure's prospects.

Demelza gives birth. Ross welcomes old friend Dr Dwight Enys to Cornwall.

George expands the Warleggan empire, launching a new ship and bankrupting Carnmore.

The Poldarks determine to get their relationship on track and the Enyses announce they're expecting a baby. Hugh's worsening health threatens his chance to stand in the election, and the prospect of him remaining in Cornwall adds pressure to the Poldarks' fragile marriage. At the Sawle Feast, Tom Harry challenges Sam to a wrestling match. When Emma offers herself as the prize, Sam accepts.

Ross is reunited with his family at home, but tragedy strikes in Cornwall. Dwight tells Caroline some devastating news about Sarah. Ossie is seen visiting Rowella by her husband Arthur, who grows suspicious. Emma returns to give Sam her answer, whilst Drake is persuaded into courting Rosina.

Ross Poldark returns home after American Revolutionary War and rebuilds his life with a new business venture, making new enemies and finding a new love where he least expects it.