Rented by the BP oil company to drill an oil well in the Gulf of Mexico, the Deepwater Horizon drilling rig explodes on April 20, 2010, before sinking into the ocean and causing a gigantic oil spill. At issue: negligence in the maintenance and in the tests carried out. On September 19, after months of unsuccessful attempts, the spill is finally declared sealed. But the harm has been done: this incident has generated the biggest marine oil disaster in history, tragically impacting the local ecosystems and economy.