Ninja Kai is under training to become the Spinjitzu Master of Fire. He was sent to the bamboo forest by his master Sensei Wu to protect the golden scythe. The evil skeleton soldier Bonezai comes there to steal it and Kai must save the ancient weapon from him. The LEGO Ninjago Ninja Ambush Set is a 71 piece set that includes 2 mini figures Kai and Bonezai and a bamboo ambush with catapult action that launches different attacks!