Sylvie and Dan Winter are a married couple in their early thirties, living a comfortable life with their twin daughters. During a routine medical check-up, their doctor informs them that, barring accidents, they could live another 68 years together—a prospect that unsettles them both. To keep their relationship exciting, they embark on "Project Surprise Me," planning unexpected gestures for each other. However, their well-intentioned surprises lead to unforeseen complications, revealing secrets and testing the strength of their bond.