Retired archaeologist Judith Potts lives alone in a faded mansion in the peaceful town of Marlow, filling her time by setting crosswords for the local paper. During one of her regular wild swims in the Thames, Judith hears a gunshot coming from a neighbour’s garden and believes a brutal murder has taken place.

While working a job at an exclusive ski resort to support her Dad, Kim learns to snowboard and is so good at it that she enters a competition with a huge cash prize. She has to dig deep to overcome her fears, but her life gets more complicated through her spoken-for boss, Jonny.