Based on a true story, The Blue Butterfly is about a terminally ill 10-year-old boy (Marc Donato) whose dream is to catch the most beautiful butterfly on Earth, the mythic and elusive Blue Morpho. His mother (Pascale Bussières) persuades the renowned entomologist Alan Osborne (William Hurt) to take them on a trip to the jungles of Central America to search for the butterfly, leading to an adventure that will change their lives.