The Code Breakers are called to investigate a series of koi murders on Uncle Cheng's farm. Is it the work of a spiteful neighbour or someone with more sinister intentions? Will The Code Breakers be able to identify the perpetrator and unravel the mystery?Join The Code Breakers as they tackle exciting puzzles that lead to deeper investigation and intrigue Matthew, Bell and Jimmy have always loved Maths. Little did they know that their hobby would...