It's another night, and it seems that Ben and Gwen are arguing again, as usual. This time, they are quarreling about who's birthday to celebrate, though Grandpa Max doesn't seem to be satisfied of their decision. Their argument distracts Grandpa Max, and almost hits a young boy from Camp Opinicon, where they must head to bring him to the camp nurse. The area seemed abandoned, though they find that it was recent. In the kitchen, they find two more campers, twins this time, who were hiding from what the camp may have been running away from. It appears that alien mushrooms are attacking the premises, and Ben is here to save the day!
