On a summer holiday with his family, Marlon Keys is about to hike the Appalachian Trail in the USA. He isn't exactly thrilled about the trip – he'd rather play on his smartphone and connect with his friends back home. But when Marlon accidentally gets separated from the group on the hike, his "boring" holiday becomes an exercise in survival. Can Marlon find his way back to his family and camp safely, or will he remain lost on the trail?
Jasmine Lopez and her brother Arjun love exploring the coral reefs around Fiji, where their marine biologist parents are stationed. Jasmine, already a certified scuba diver, dreams of following in her parents' footsteps and wants to help Arjun do the same. Unfortunately her younger brother is sure he already knows everything. That attitude gets them into danger when Arjun drifts too far from the group during a dive - and straight into a reef shark.
Tanisha Carter can't believe her luck when she finds out her favorite extreme obstacle course challenge is coming to her town. She needs a partner to compete, so her video game pal, Derek, agrees to team up with her. Derek is big for his age, but strong, and Tanisha is sure their combination of speed and strength will make for a winning team. But when training reveals Tanisha's fear of heights, the pair realizes they have more than one obstacle to overcome in this extreme challenge.
Nita and Sohail are thrilled when they win scholarships to attend the Alaska Young Explorers program. Both kids could use the prize money to help their families and set out to compete as hard as they can. But things take a turn when they're paired up on an expedition. The two make a misstep while hiking down a glacier and find themselves in dangerous territory. Nita and Sohail will have to depend on each other and learn to work together ... if they want to survive the Alaskan wilderness.