4/5
After Katherine gets a concussion, she wakes up to learn that not only does she need to be monitored for 48 hours, but she forgot to remove her ex, Tom, as her emergency contact. Now she and Tom are on their way to celebrate Christmas in Chicago so Tom can propose to his new girlfriend.
Katherine was such an unlikable character, and yet I was quickly rooting for her and Tom to make it to Chicago and figure out their relationship.