Millie Bobby Brown AKA girl online is your everyday typical teenager going through the awkward stages of life and anxiety, with her gay best friend Noah! Millie has a lot of challenges facing her such as 'fake friends' and crushes! But all takes a turn on Millie when her mum books a work trip to New York where Millie meets a teenage boy named 'Finn' who has a passion for music and loves to go on adventures in his red rusted pick up truck! But Finn has a secret that could threaten the true identity of 'girl online'