Thirteen-year-old Nate needs a break from looking after his newly disabled mom. One day when his mom thinks he's at a cross-country meet, he goes to the mall with a friend he's forbidden to have contact with. At the skate shop he sees a new board he can't afford but has to have, and Nate gets talked into running a scam. It turns out Nate looks a lot like a teen TV star filming in the area. So he and his buddy get girls to pay cash to be extras on set. It's all fine until Nate meets a girl he really likes. Nate knows he has to tell her the truth, but he's not sure he has what it takes to come clean.
Dylan and his friends attract the attention of the police when a summer bonfire gets out of control. Dylan almost loses a job opportunity at a local inn because of his antics, but he is saved by the lies of Heather, an employee of the inn. When he is caught on camera stealing towels from a summer cottage after a skinny-dipping prank, Dylan and his friends become suspects in a number of cottage robberies. Dylan learns everything he can about the robberies, with the hope of clearing his name, and finds himself in more than one sticky situation in the process.
On a visit to a seaside town in Australia, fifteen-year-old Sam meets Annabel, who works at the local museum. Annabel's interest in history is infectious, and Sam soon finds himself eager to hunt for the remains of a boat called the Mahogany Ship—a shipwreck sought after by many. When a storm creates an erosion hole that exposes a structure, Sam and Annabel are convinced it's the fabled ship. Soon all of the museum staff are at the erosion site to check it out. But the same storm also destroys the museum's power; someone knows the alarms aren't working and steals the museum's most treasured artifact, a large porcelain peacock worth $4 million. As Sam and Annabel search for the thief, they realize there may be a link between the fabled shipwreck and the recent theft.
Dylan is back, and this time he is making a movie, The Rise of the Zombie Scarecrows, with his best friend, Cory, and his girlfriend, Monica. The film is for school credit, and their plan is to film on Halloween. Everything is falling into place until Dylan and Monica encounter a zombie scarecrow that causes Mr. Dalton, a friend of Dylan’s grandmother, to have a heart attack. Dylan and Monica learn that a couple of zombie scarecrows are pranking a local neighborhood. The police shut down Dylan’s project until the pranksters are caught. But Dylan is determined to see his film through to completion, no matter what the cost.
Trevor, Nick and Robyn are ready to solve another mystery. When bobsledder Josh Gantz is accused of deliberately injuring a fellow competitor, he runs the risk of being thrown out of the sport -- right before the World Cup. Courtney Gantz asks Trevor, Nick and Robyn to help clear her brother's name. Can they find out who framed Josh? What is the meaning of the strange coded messages they keep finding around Olympic Park? Who eats orange bananas, anyway? The kids must unearth the clues in a race against time, before Josh's championship dreams end up on ice.
While volunteering at the local zoo, Robyn, Nick and Trevor learn that grizzly bears are being poached and their gall bladders removed for use in alternative medicine. Always ready to solve a mystery, the kids set out to find the poachers. Bear is not only big game, they learn, but big money to poachers. The stakes are high and the suspects many, as the kids head into their most dangerous adventure yet.
When Trevor, Nick and Robyn visit the Royal Tyrrell Museum, Robyn is inspired to raise funds for a dinosaur dig that will close soon if it doesn't find funding. The kids are caught up in another mystery when a chain of suspicious events, including the disappearance of important fossils and a fraudulent discovery at the dig, leads them to wonder what's going on. Is the new visiting scientist behind the fraud, or did Robyn's enthusiasm to save the dig lead her astray?