It looked old from the outside. But the inside was new. There were secret rooms in the lighthouse. And secret places all over the hill. The new Border Guard test room was on the other side of the hill. Away from the lighthouse. ‘We need to take the bullet train back to the lighthouse,’ said Kai. Kai climbed into the bullet train. BC climbed into the seat behind him. ‘Ready?’ asked Kai. ‘Ready,’ said BC. Kai closed the train’s glass lid. Then he put his Border Guard Card into the slot on the dashboard. The train’s engine started and the train shot through the tunnel. The train began to slow down near the battle chamber. ‘My collar is flashing,’ said BC. Kai turned to look. Then his orb flashed too. ‘You got an upgrade. The BMC doesn’t say what it is. Any upgrade is good!’ said Kai. The bullet train pulled in to the battle chamber. It stopped and Kai and BC climbed out. Kai’s orb beeped again. A new message flashed. Kai smiled. ‘There’s a new space in the battle chamber, BC,’ he said ‘Wall three has changed.’ Kai said.