The students of the 121 Express are infamous for bad behavior and Lucas knows his role on the bus will determine his social standing at his new school. Lucas is tired of being one of the nerds. When he attracts the negative attention of the cool troublemakers, he saves himself by teasing another kid. His ploy works and soon Lucas is right in the center of the mayhem on the bus. He loves his new found popularity, but when the fun and games push the bus driver to a nervous collapse and hospitalizes an elderly lady, Lucas begins to question his choices.
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.
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.
The principal announces that the school is implementing uniforms, and Ian finds himself caught in a conflict. His friend Julia wants him to devise a plan to fight the decision, and the principal is determined to convince Ian the uniforms are a good idea. Ian wants nothing to do with the issue. While doing research for a social-justice class, he learns that the manufacturer of the uniforms is on the top-ten list for human-rights violations. When he tells the principal this, all he gets is a reminder that the penalty for refusing to wear the uniforms is suspension, and Ian finds himself caught in a whole new conflict -- one with himself.
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.
Laurel discovers her passion for investigative journalism when she writes an article for her school paper about the homeless man who's been living at the school. Eager to write more articles with impact, she launches an investigation of a cheating scam at her high school. Laurel's efforts elicit hostility from her classmates. Nobody is interested in seeing her article go to print, not even her own brother. It is evident that the cheating is widespread, and Laurel, caught up in the thrill of the investigation, is willing to commit social suicide to get the story, but her ultimate discovery changes everything.
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.