Fran (Frog Stone) is a reserved, high school history teacher in a rut. Mim (Miriam Margolyes) is an eccentric free spirit who believes 70 is the new 40. They are also mother and daughter and their relationship is not exactly easy.
But when Mim reveals she is dying and wants to go on a road trip to tick items, one by one, off her preposterous bucket list, Fran feels that she has no choice but to come along for the ride. She has to learn to let loose and Mim has to learn to think of someone else for a change. Both of them have to make the most of the time they have left together and find a way to accept the fact that it will soon be at an end. But with Mim and Fran, tragedy always somehow ends up as comedy.