Jonas remembered when a plane flew too close to the town, causing every citizen to panic. And it caused him to wonder about how he felt during the event.
Jonas and Asher were tossing an apple back and fourth after eating. It seemed like a harmless game of catch, but Jonas saw the apple change in mid-air.
Jonas was told he was selected as a Receiver. It was considered a very important job in the community.
Jonas meets The Giver, aka the former receiver, and learns that he is the one that has to aquire memories for the community.
Jonas, after almost a complete year of receiving, starts to realize how bad the community is as a whole. He then decides to devise a plan to release memories onto the people to help them realize as well. He also is able to see color at this point.
Jonas leaves with Gabe after finding out about his planned release. He was going to leave originally to release memories to the community.