It is the morning of Cathy's husband's funeral and her family gather at the house to wait for the funeral cars. Battling her brother's partner and meeting her son's new and over-enthusiastic girlfriend Kelly, Cathy prepares herself for a day of great emotion with help from her friend Michael.

It is Cathy's first Valentine's Day since she lost her husband. Her brother Derek comes round to keep her company but his partner Pauline wishes that she was anywhere else.Cathy's son Jason has some surprising news for her and when Michael turns up unannounced he's concerned to find that Cathy has received a Valentine's card.

Cathy is clearing out her garage and the family come round to help.Her brother and his partner are fresh from playing golf and making friends with a millionaire. Kelly's mum comes round to take an old fridge and Cathy sees a new side to Kelly. Michael is helping out too and faces a decision.Brand new comedy from Bafta Award winning writer of Him and Her Stefan Golaszewski, Mum is a subtle family sitcom seen through the eyes of Cathy (Lesley Manville) following year in her life as she moves on from the death of her husband.Starting with the family gathering for the funeral in January and ending on New Year's Eve, the story unfolds through the major and minor events of a year. It's the story of a woman finding who she is again and maybe, if she could only see it, finding love second time around.