The sudden arrival of DC Leila Hussain in Port Devine results in residents pondering the reason behind her arrival. Inspector Finn O'Hare knows why Leila has transferred to Port Devine, but is keeping it to himself.
When Louise's son turns up with a gun, Jo sees an opportunity to prove that Louise is a criminal; Finn's birth mother, Assumpta, makes some bad first impressions.
When Ryan discovers what has really been going on in his brother's seemingly happy marriage, he's forced to make a momentous decision about his own relationship with Niamh.