When the teenage son of a former friend hires her to defend him in a murder case, Alicia makes a difficult journey back to her old life.

Alicia and Will have only 72 hours to find the smoking gun that proves the train company, and not the three engineers, is responsible for the crash, thus securing the widows their pensions the company is holding back. Meanwhile, Jackie and Alicia clash over taking the children to visit their father in prison.