"Harold is an iceberg... lettuce. (But he doesn't realize the 'lettuce' part because part of his sticker has ripped off.) So one day when he sees a documentary about how the icebergs are melting, Harold starts to worry, thinking that he's melting too. As his anxiety grows and grows, and he tries to find a way to stop melting, his fellow food friends try to help him cool down in a different way." --publisher's website