While on a holiday Detective Inspector "Sarge" Downs, his partner Sarah, their daughter Katie and Sarge's Uncle Ray accidentally come across a drug trafficking business that has links back to Cairns where Sarge is in charge of the Criminal Investigation Branch. Unwittingly caught up in the delivery of drugs around New Zealand, they continue their journey and seek help from the New Zealand police and the New Zealand Security Intelligence Service who also become involved. As they explore many of the things that the South Island of New Zealand has to offer, they are always aware of the danger that they face.