Nine-year-old Elsie is apprehensive but excited when her mom's new job means moving to a home in the country, closer to her beloved grandma. She's surprised to discover that the house is already occupied by another family-Niles the mouse and his mom, Sara. Lonely Niles longs to be friends with Elsie, and Elsie is enamored with Niles but worries her mom won't be thrilled about a mouse in the house. Things take a turn when Niles encounters Grandma's sassy cat, Raymond, and ends up lost far from home. Now Niles must embark on a wild adventure full of harrowing escapes and unlikely friendships in his quest to reunite with his mom and his new best friend, Elsie.
This heartwarming and timeless tale encourages young readers to embrace the unfamiliar while reminding us that home is so much more than where we live.