Katerina's small, safe life in London is upended on Christmas Eve when her beloved mum passes away. Two days later, she sees her boyfriend of five years kissing the local librarian. Kat goes to bed and pulls the covers over her head, convinced she will never recover from these losses.

To Kat's great surprise, her mum has left her four letters to guide her through her grief and an air ticket to Swedish Lapland for a wild adventure. Before Kat knows it, she's at the top of the world with a backpack and her headstrong French bulldog, Olive.

On the challenging, exhilarating eight-day trek, Kat learns she can come to terms with her mum's death. She also encounters Anna, lanky and gorgeous, who invites her to Stockholm for a weekend of passion.

The three days they share awakens Kat to her truth. It leads the way to her desires, including a long ambition to open a small bookshop in her London neighborhood. But how can she do that and follow her heart with her new love? Will the dangers and complications that face both her and Anna force her hand?