When eleven-year-old Billie learns a secret inspector is staying at her mom's hotel, she turns into a pint-sized detective determined to uncover him and win back her mother’s attention. She launches into a series of misadventures among the hotel's suspicious guests. Framed as a lighthearted mystery, the film explores a child's longing for parental love while delivering a warm message about understanding and communication. The comic chaos unfolding within the hotel's confined space only adds to its irresistible appeal.