Thanos attacks the Asgardian ship, killing half of Asgard’s remaining civilians with the power stone. Thanos subdues Thor and easily beats the Hulk in a short brawl. Heimdall is killed after he uses the Bifrost to send the unconscious Hulk back to Earth as a warning to the Avengers
Loki turns over the tesseract to save Thor’s life, and is killed for his efforts to betray Thanos
Thanos sends his lieutenants, the Black Order, to retrieve the 2 stones on Earth
Ebony Maw captures Doctor Strange and the time stone, despite intervention attempts by Bruce Banner, Peter Parker, Tony Stark, and Wong. Tony and Peter infiltrate the Maw’s ship and manage to save Strange and kill Ebony Maw. They decide to continue the course to Titan to kill Thanos
Wanda, Rogers, and Romanoff are able to protect Vision in Scotland
The Guardians of the Galaxy respond to the Asgardian distress call and find Thor. Thor enlists the help of Rocket and Groot to go to Nidavellir to get Stormbreaker, after which they start heading to Earth
The rest of the Guardians go to Knowhere to stop Thanos from recovering the Reality stone, but arrive too late. Thanos captures Gamora, who he forces to reveal the location of the Soul Stone by torturing Nebula
On Vormir, Thanos encounters Red Skull, and sacrifices Gamora to retrieve the Soul Stone
Meanwhile, Quill, Drax, and Mantis head from Knowhere to Titan and team up with Strange, Stark, and Parker to ambush Thanos
Captain America bands with War Machine, Bucky, Falcon, Widow, Banner, and Wanda to protect Vision and his mind stone. They find Shuri in Wakanda in hopes of removing and destroying the mind stone without killing Vision
The Black Order attacks Wakanda, but our heroes, with the help of an arriving Thor, Rocket, and Groot, defeat the army
Meanwhile on Titan, Thanos defeats the combined efforts, in part due to Quill losing his cool about Gamora's death. Strange, after seeing millions of alternate futures, relinquishes the time stone to save Stark's life. With that 5th stone, Thanos heads to Earth
Back on Earth, while the Avengers attempt to hold Thanos back, Wanda is forced to destroy both Vision and the mind stone. Thanos uses the time stone to reverse the act, and rips the stone from Vision's head, killing him again
Before Thor can stop him with a mighty blow from Stormbreaker,
Thanos snaps his fingers, killing half of the universe
Before Strange dies, he tells Stark this was the only way. Before Fury dies, he activates Captain Marvel's pager. Trillions of others die, including Strange, Wanda, Parker, T'Challa, Bucky, Falcon, Quill, Mantis, Drax, Groot, Fury, Hill, and Hawkeye's family.
Thanos escapes through a portal, triumphant
At the moment of the snap, in San Francisco, Hank, Janet, and Hope are turned to dust, and Scott is trapped in the Quantum Realm via the quantum tunnel van
Tony and Nebula leave Titan aboard the Guardian's ship