Three storylines interweave in Border Line. Kurosawa (Murakami Jun) finds himself driving a taciturn young man named Matsuda (Sawaki Tetsu) halfway to Hokkaido, after accidentally knocking him off his bike; their fragile bond can last only so long. The housewife Aikawa Misa (Aso Yumi) tries desperately to hold her family together when her husband gets laid off and her son is so frightened of bullies at school that he throws up in the car; she’s reduced to taking a McJob in a convenience store. And Miyaji (Mitsuishi Ken), who collects debts for a yakuza gang, gets into trouble when his partner Kitajima puts personal need above duty.
Four boyhood pals perform a heroic act and are changed by the powers they gain in return. Years later, on a hunting trip in the Maine woods, they're overtaken by a vicious blizzard that harbors an ominous presence.
Two lost souls visiting Tokyo -- the young, neglected wife of a photographer and a washed-up movie star shooting a TV commercial -- find an odd solace and pensive freedom to be real in each other's company, away from their lives in America.
A mysterious and immortal Tibetan kung fu master, who has spent the last 60 years traveling around the world protecting the ancient Scroll of the Ultimate, mentors a selfish street kid in the ancient intricacies of kung fu.