Three of the world's best kayakers take a two-month journey to the Scandinavian paddling meccas of Iceland and Norway. While they search inside the arctic circle for rapids and waterfalls that have never been run, they're also searching for the elusive moments when the stars align and everything goes perfectly, but sometimes... in the blink of an eye... things go horribly wrong. The inevitable externalities of their main goal is what they call 'the halo effect'.

They are the world's biggest rapids, thundering down the final pitch of the mighty Congo River. Legendary kayaker Steve Fisher and his elite expedition team battle seemingly insurmountable obstacles, navigate the maddening politics of a broken Central African country and face their own worst fears in an attempt to be the first explorers to survive the Inga Rapids.

When pro kayaker Rafa Ortiz makes the decision to paddle over Niagara Falls, he sets in motion an incredible series of events that eventually takes on a life of its own. To prepare for this mission, Rafa enlists the help of world-renowned paddler Rush Sturges and a tight team of their friends. Together they go on a remarkable three-year journey from the rainforest rivers of Mexico to the towering waterfalls of the U.S. Northwest. Their journey concludes in Canada where the team plays a cat-and-mouse game with local police before Rafa's mission comes to a heart-stopping climax at the iconic Falls.