In the comedic youth drama series “My Little Big Brother" we follow the insecure teenager Fien during her first high school year. The 12-year-old Fien grows up with her mentally disabled brother Luuk, which can sometimes be difficult. This because here whole life revolves around Luuk. Now that she is saying goodbye to elementary school and starting high school, she feels like she can have a new start. A new life, without Luuk!