Joe and his friend Skip are enjoying the thrill of the Big Dip, a famous rollercoaster, until they learn the old man in front of them has been shot. The old man mutters with his dying breath something about getting a Margaret Rose to the police. Joe leaves the crime scene to get on with his life. But someone is desperate for the Margaret Rose and thinks Joe has it. When his sister is kidnapped, Joe is in a race against time to solve the puzzle.
Dan Hogg is thrilled when his uncle offers him some work at a food fair, because he wants money to hire a professional trainer to help him with his scrawny physique. His excitement vanishes when he learns that the job is dressing up in a hotdog costume and handing out samples. Every dark cloud has its lining, Dan discovers, when he, or rather Frank Lee Better, his mascot persona, gains the attention of a pretty girl named Brooke. The attention is great until Dan finds himself under attack from Cupcake Katie and a mysterious guy with a strange interest in Brooke. It's not until he's huddling in a bathroom in his tight white underwear that Dan begins to suspect Brooke's attention might be too good to be true.
Left alone for the first time on the island he calls home, Simon is looking forward to a day of personal indulgence. His sister Ellen only wants to make sure they get their chores done. Their parents are busy trying to convince the government not to close the lighthouse that the family operates, and it's up to the kids to make sure everything runs smoothly. Neither Simon nor Ellen is prepared for the mysterious and potentially dangerous visitor who brings with him an unexpected storm and a riddle that may lead to treasure - treasure that could help them save the lighthouse. Simon and Ellen have to work together to solve the riddle before the stranger or the weather destroys their chances.
Jim, Mickey and Lisa belong to a secret club called the Sewer Rats. Every Saturday the Sewer Rats reign supreme in paintball wars held in the city's storm drain system. The new kid, Carter, wants to join, but Lisa doesn't want him in the club. When Carter is hurt in his first paintball war, Jim and Mickey suspect that Lisa planned the accident. They try to confront her, but she runs into the tunnels just as a rainstorm begins. Jim and Mickey have to get Lisa out before the tunnels fill with water.
Nadia is playing for her local soccer team, and they have made it all the way to the national tournament - against some very determined opposition. Unfortunately, Nadia's challenges don't just come from her opponents but from her teammates as well. After their coach is injured in a suspicious accident and the threats against the team mount, it is up to Nadia and her younger brother Devin to pull the team together and take a run at the championship.