(Sorry about being a day late with this one).
Just like Toy Story 2, we open with an elaborate intro as we see  Woody,  Buzz, & Jessie going up up against the Evil Dr. Porkchop.  We then see it was a young Andy playing with his toys and then we get a montage of Andy growing up.
We flash forward to ten years later, and Andy is now in his twenties. And we learn that a lot of our friends from the previous installments have been sold off such as Bo Peep. The toys  try one last time to get Andy’s attention.
Woody tries to convince the toys that they can stay up in the attic but the toys are reluctant  to this idea but they agree to it. Andy bags the toys and they are mistakenly taken out to the curb to be picked up by the trash. Oh, and Hi Sid.
Woody tries to save his friends with Buster but the years haven’t been kind to the old dog.  The toys escape however and load themselves into the Sunnyside box to be donated to the daycare.
The toys load up into the Sunnyside box thinking that’ll be better off there.  When I re-watched this film, I wanted to tell the toys to get out of there knowing what would happen as they are sealing their fate. Woody tries to explain to the toys that Mrs. Davis that they were accidentally thrown out but they don’t want to listen to him as they think Woody won’t let go of the past.  As the toys arrive, they are duped into thinking that they’ve found a great new home but it’s a big lie.
All of the toys sans Woody decide to stay and Woody makes his daring escape. Which is quite awesome.
During his escape,  Woody is found by a little girl, Bonnie Anderson.
Which leads to one of the most adorable moments as we see Woody getting to enjoy playtime once more.
But also one of the most tragic moments as we get Lots-o’ backstory.  Which is just so tragic.
Woody realizes that he needs to get back and save his friends but the toys warn him that this will not be an easy feat. And this is when Andy’s toys learn the truth and Buzz is reprogrammed.  And lock the toys up and the daycare becomes a prison.
And as Potato Head put it, we have the return of the Astronut.  And it’s here now, where the toys start to realize their mistake in not staying with Woody. Speaking of the cowboy, he returns and formulates a plan to escape with the aid of Chatter Telephone.  And that night, Chatter informs them of the Monkey that they need to watch out for as he is Lots-o’s eyes and ears.  And Potato Head helps them with a diversion by becoming Mr. Cucumber Head, oh and Buzz is reprogrammed once again and this time, we have Spanish Buzz.  Sigh, I am not a fan of Spanish Buzz, I found this to be rather annoying.
The toys almost make it but it’s seems they are trapped as they are stopped but Lots-o’ and then Woody reveals the truth and when we get a Star Wars reference as Big Baby throws him into the dumpster.
But it seems it may be too late as he pulls Woody in and the rest of Andy’s toys won’t abandon their fearless leader once again, so they try to pull him out but to no avail. And this is where we get one of the most gut-wrenching scenes because after Andy’s toys save Lots-o’, he leaves them to die. And who should save our heroes but The Aliens who now control The Claw.