Against the backdrop of the Troubles, young Catholic teacher Cushla falls for a married Protestant barrister.

Cushla and Michael's secret affair deepens but dangerous politics are closing in. Meanwhile, Davy's troubles grow.

Cushla and Michael fall deeper amid danger - until she discovers he's lied to her. Michael promises honesty, but just as they commit, tragedy shatters everything.

A grieving Cushla confides in Gerry and Gina, and goes in search of the truth, leading to a shocking climax that unites the family.