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?
Trevor, Robyn and Nick decide they have a mystery to solve when Trevor discovers a suspicious looking young man snooping around. They learn about missing research involving the use of carob beans to aid in cancer treatment-potentially valuable information. With a shady looking grad student, a bitter activist and an employee of a medical research firm to deal with, our amateur sleuths are faced with their greatest challenge yet.
As much as life has irrevocably changed since the death of his father, much has stayed the same for Cam. He's always had a great deal of responsibility around the house, but the burden is heavier now in combination with the load of grief he's been carrying. After the man who was driving the truck that killed his father turns up at the end of the driveway, Cam feels pressure to keep his family safe as well. He starts to see the man everywhere: at his work, in stores, at his sister's school. Cam needs to know what the man wants from his family, and he starts following his father's killer in search of answers.
Wilf is convinced his parents want nothing to do with him. When he isn't in school, he is left to his own devices or shipped away to camp. But at fifteen, Wilf is adamant that he is too old for summer camp. When his parents ignore his protests and ship him off anyway, he knows how he will get their attention: He will escape from camp by canoe and spend the rest of his vacation alone in the woods, proving to his parents he deserves his independence. His plan begins to unravel when his cabin mate forces Wilf to take him along. Things go from bad to worse when a younger camper follows them and they all end up in a fight for their lives against the unforgiving river.
Fourteen-year-old Matt has only one goal in life: to become a hermit. He has no use for school, but he loves the solitude of the forest. When he hikes up to the cabin he built for himself, he discovers a mysterious stranger named Forrest has moved in. At first Matt doesn't connect Forrest's appearance with the rash of local robberies. Forrest seems to be the perfect hermit, and he teaches Matt the skills he needs to achieve his goal, including how to hunt with a crossbow. But when Forrest tries to kill an endangered Roosevelt elk, Matt questions the ethics of his new friend. When Matt discovers a stolen rifle in his cabin, he finds himself trapped in a dangerous situation.
Turk needs cash, but he's allergic to his own sweat so getting a job is out of the question. Then he makes a discovery: Girls love dogs. Turk's friends will do anything to meet girls. Turk starts a dog walking business. His friends walk the dogs and Turk collects half the money. In an attempt to impress dog-loving Carly, Turk brags about his business in front of the school tough guy, Chuck. When Chuck learns the true nature of Turk's business and wants in on the action, Turk worries that he will lose his business and Carly's respect.
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.