This film chronicles the life of Richard Feynman, a Nobel Prize-winning physicist who worked on the Manhattan Project, the undertaking to build nuclear bombs during World War II. But "Infinity" concentrates on the relationship between Feynman and the love his life, Arline. Early in their courtship, Arline is diagnosed with tuberculosis. Despite his family's objections -- and the danger it poses to him -- Feynman marries Arline. However, when Arline learns that she has Hodgkin's Disease, it puts a strain on their marriage -- that only the strongest of bonds can survive...