On the day of planning an assault against the BO the FBI and CIA worked together with Conan and akai to find the fastest way in. For Conan it was the opportunity to bring down the organisation and get the information on the aptx that turned him and Haibara into a child and she could make a permanent cure. But Ran started getting suspicious of conan as he started to come home late. On the day of the assault of a hidden lab Conan woke up earlier and Ran who heard the noise followed him very discreetly to the rendezvous point to finalize the plan. At order of the FBI the PSB and Inspector Megure and the traffic department barricaded the Area in a 30 meter radius. Mouri ran was hiding in the trunk of a car. As they raided the place some of them managed to escape and took the car that Ran was in and rammed through the barricade. Conan ran to akai and boarded his truck and went after the criminals not knowing that Ran was inside the truck. The chase went up to the mountains and shots were fired at each other as more patrol cars were coming from the opposite direction akai shot the wheel of the car and it turned to the left and fell of the side of the cliff. As every one went down to look they saw the member of the BO dead and they saw blood coming from the trunk as they opened it Conan's face turn pale in shock of what he saw it was Ran bleeding loosing alot of blood they immediately called an ambulance sadly it was to late she died of blood loss on the way the hospital and when conan learned the news he fell down in grief crying very loudly for hours until professor agasa came to take him to mouri kogoro house as he came in with no sign of life kogoro was concerned and asked what happened he slowly said s-sh-she d-died in a car accident. Mori couldn't even say a word.
It was raining very badly on the day of her funeral the detective boys were there with there parents all crying haibara with agassa, kogoro crying on eri conan of one corner all depressed cold as ice
and sonoko her best friend after one by one left sonoko was the last one to leave Professor agasa to her home then she couldn't hold it anymore she just fell to the ground in despair as every person she liked just disappeared from here life. The next day information was that there was an explosion in the lab and that all the data was gone for conan it was getting worse first he lost Ran then now he lost all the data on the poison. He leave the mori agency and went to live in his old house because he would remember Ran dying again and again. At school he was ice cold only answering questions in class the ayumi ask if he was okay he would just stare at them. At seventeen he was the best detective in tokyo but the fire in him had died with the death of his loved one