London journalist Tom Ronstadt's world falls apart as a result of his own actions. Upon returning to his Lancashire hometown after 18 years, he finds his father, Sam, in the grips of Alzheimer's disease. During the course of the series, Tom begins to unravel the mystery of his childhood that drove him away many years earlier. Trying to extract information from Sam causes Tom to grow frustrated with his father's inability to remember. Tom continues on his quest for the truth, unaware he is unearthing a devastating crime that will reveal unimaginable secrets.

• John Simm
• Jim Broadbent
• Olivia Colman
• Nico Mirallegro
• Claire Goose
• Daryl Fishwick
• Shaun Dooley