Roller Coaster is about a little boy who grows up without his real parents and believes that his nanny is actually his mum. Sam makes decisions that affect everyone around him. Whoever thought that going to the toilet at a mall could change your life forever? Facing two adults with rifles should scare any four-year-old, but not Sam and Sturt. Starting school can be very scary, but both Sam and Sturt are ready for a new chapter in their lives—a new chapter they will never forget.