On a cold Autumn's day, three year-eleven GCSE students get together to go 'trick or treating' but their journey backfires. After one of the students suddenly goes missing, despite their opposing personalities, each of the students must work together to find her. Join Harry and Noah on their adventure across their hometown where they will meet all sorts of peculiar people and things. But to cross to the other side there is one obstacle - Lungwort Field.