Steve and a team of world class kayakers head to the Kamchatka peninsula in the Russian far east, to take on the first descent of the Kronotsky River – through white-water so extreme that it has never before been attempted. The team set out to paddle from source to sea, starting in the shadow of a still active volcano and ending at the Pacific Ocean – kayaking through an unspoilt wilderness packed with more brown bears than almost anywhere else on the planet. If the team can make it through the white-water, they will enter an untouched landscape and witness brown bears in their natural habitat – unaffected by humans. These Russian brown bears are so isolated, some of them may never have seen people before. There are few places left on this rapidly changing planet that remain intact, but on this expedition Steve and the team experience nature as it should be.