When using his cell phone while driving, Tim Thomas (Will Smith) causes a car crash and kills seven people (six strangers and his fiancée, Sarah Jenson).
He decides to make up for the lives he took away by saving other seven lives and starts donating his organs. He uses his brother's credentials, an IRS employee, to check out people's records. He targets people with rare conditions and makes sure they really deserve it. For example, he calls a blind guy who needs a transplantation of corneas and harasses him to see if he's quick to anger and if he's a good person.
After he gives his luxurious beach house to a mother of two living with an abusive boyfriend, he moves into a motel and prepares his suicide. His friend Dan (Barry Pepper) acts as executor to ensure that his organs are donated to a young woman with a critical heart problem and a rare blood type and the blind person. When he decides he's ready, he calls his friend, fills the bathtub with ice water to preserve his vital organs, climbs in, and commits suicide by pulling his box jellyfish into the water with him.