Liam, an 18-year-old grappling with unrequited love decides he is going to eat a slug to impress a girl. He is interrupted by Mandy, a masked middle-aged woman who emerges from a rattling old fridge. Mandy claims to be Liam's wife from the future, urgently pleading with him to avoid eating a slug he found in the garden. Mandy reveals that the slug harbors a deadly parasite that will paralyze Liam for 17 years, derailing his life and leading to their eventual meeting in a rehab center. Despite hi...