Mary Katherine’s dad is researching a group of soldiers within years (Amanda Seyfried). The research pushes him to have a journey in the wild, until one day, her father is not back. Then, Mary decide to look for him. In the middle of searching, her body is getting so shrinking that makes her getting trapped on the creature whose father researched for. The New Mary’s adventure is when she tries to find a way home and help her new friends fighting against the evil Boggans.