Greg is coasting through senior year of high school as anonymously as possible, avoiding social interactions like the plague while secretly making spirited, bizarre films with Earl, his only friend. But both his anonymity and friendship threaten to unravel when his mother forces him to befriend a classmate with leukemia.

Maggie is an alluring free spirit who won't let anyone – or anything – tie her down. But she meets her match in Jamie, whose relentless and nearly infallible charm serves him well with the ladies and the cutthroat world of pharmaceutical sales. Maggie and Jamie's evolving relationship takes them both by surprise, as they find themselves under the influence of the ultimate drug: love.