Next Door Spy (2017)

Plot

Ten-year-old Agathe-Christine, known as AC, thrives on solitude and has a passion for solving mysteries. After relocating to a new building, she sets up a makeshift detective bureau in the basement. What starts as a straightforward case quickly spirals into a far more complex enigma than AC anticipated. As she navigates the twists and turns of her investigation, her skills and determination are put to the test, revealing secrets that challenge her abilities and perhaps even her understanding of those around her.