Tippy Chan is eleven years old, and she lives in a small town in a very quiet part of New Zealand. Her Uncle Pike and his new boyfriend Devon are looking after her while her mum is on a Christmas cruise. Tippy can't get enough of her uncle's old Nancy Drew books. So, when her teacher's body is found beside Riverstone's only traffic light, it looks like Tippy's moment has arrived. She and her minders form The Nancys, a secret detective club. But what starts as a bonding adventure quickly morphs into something far more dangerous. A wrongful arrest, a close call with the murderer, and an intervention from Tippy's mum all conspire against them. Regardless of their own safety, and despite the constant distraction of questionable fashion choices in the town that style forgot, The Nancys know only they can stop the killer from striking again.