Eighteen months after losing her sister Claire, Meredith is still grappling with her grief and guilt. The annual family trip to Martha's Vineyard, a place brimming with memories of Claire, forces Meredith to confront her pain and learn to navigate life without her sister. Through the support of her family and the joy she rediscovers in their annual game of Assassin, Meredith slowly begins to heal and embrace the future.

The Fox family, though far from perfect, demonstrates the unwavering strength and comfort found in familial bonds. Despite their individual quirks and disagreements, they rally around each other, providing a safe haven for Meredith as she grieves. The annual Assassin game, a beloved tradition, becomes a testament to their enduring love for one another and a tangible link to Claire's memory.

When Meredith reluctantly agrees to team up with a charming groomsman in the Assassin game, she never expects to fall for him. Their playful alliance blossoms into a sweet and unexpected romance, reminding Meredith that love can bloom even in the midst of heartache. This budding relationship allows her to open her heart again and embrace the possibility of new beginnings.