Resident Evil 5 plot 3-3

Chris and Sheva board the tanker and encounter Excella, who escapes after dropping a case of syringes; Sheva keeps several. When Chris and Sheva reach the main deck, Wesker announces over the ship's intercom that he has betrayed and infected Excella with Uroboros. She mutates into a giant monster, which Chris and Sheva defeat. Jill radios in, telling Chris and Sheva that Wesker must take precise, regular doses of a virus to maintain his strength and speed; a larger or smaller dose would poison him. Sheva realizes that Excella's syringes are doses of the drug. Chris and Sheva follow Wesker to a bomber loaded with missiles containing the Uroboros virus, injecting him with additional doses. Wesker tries to escape on the bomber; Chris and Sheva disable it, making him crash-land in a volcano. Enraged, Wesker exposes himself to Uroboros and chases Chris and Sheva through the volcano. They fight him, and the weakened Wesker falls into the lava before Chris and Sheva are rescued by a helicopter piloted by Jill and Josh. Although the dying Wesker tries to drag the helicopter into the volcano, Chris and Sheva kill him with rocket-propelled grenades.^[11] In the game's final cutscene, Chris wonders if the fight is worthwhile. Looking at Sheva and Jill, he decides to live in a world without fear.