When crop circles appear in Tully, North Queensland, twelve-year-old Dell knows it's a hoax. She's a future climate scientist who believes in facts, not science fiction. But Dell's estranged mum is an extraterrestrial fanatic. She blusters back into town armed with alien conspiracy theories and a dazzling smile.

If Dell can prove the crop circle is fake, surely her mum will hightail it out of Tully again, preferably before she causes Dell's dad and three sisters further heartbreak. But as her mother's claims grow more out of this world and alien fever takes over the country, Dell worries she's fighting a lost cause. How can she convince anyone of the truth when they're all so desperate to believe a lie?