David Suzuki, iconic Canadian scientist, educator, broadcaster, and activist, delivers a lecture on the eve of his 75th birthday, which he describes as a distillation of his life and thoughts, his legacy, what he wants to say before he dies. Filmed before a live audience, in front of a memory box of moving, distilled images, he articulates a core, urgent message: the limits of the biosphere have been exhausted and it is imperative that humans rethink their relationship with the natural world.