In the heart of San Francisco, a group of young coders and designers come together to invent a new social media platform they name Twitter; built for simple status updates, Twitter quickly evolves beyond its original purpose.

As Twitter transforms communication across the world, its founders fight for control of the company; once reserved for techies and celebrities, it evolves into a key platform for news and politics.

A new CEO takes over and brings back founder Jack Dorsey to help steer Twitter's growth; activism thrives as the platform becomes a revolutionary tool for change, but its darker side becomes more apparent as hate spreads.