Summer camp isn't quite what Henry expected.
Henry was ready for a fun summer with friends at a mountain bike camp in the wilderness. However, the head counsellor, Shifty, seems more interested in putting them to work hammering nails and hauling building supplies, instead of teaching bike skills and lighting campfires. Worse still, every time Henry tries to find a bit of freedom, something goes wrong! When Henry is reunited with his old pal Yarp (an extinct short-faced bear) and his fellow yarpies, things start to look up. Henry even discovers that what the campers thought were lake monsters are actually a herd of gentle mega sloths from the Ice Age era. But everything changes when the smoke appears. A forest fire is headed their way and with Shifty nowhere to be found, the kids and their megafauna friends have to band together to escape.
