While it was believed that director Michael Bay's Transformers 4 will begin production in Chicago this summer, the action sequel will actually start shooting in Detroit this spring. The Michigan Film Board has granted a $20 million incentive on the proposed $81.9 million they plan on spending in the state of Michigan. Although an exact production start date wasn't given, the Michigan Film Board press release did include a synopsis.

We can't include the synopsis as it appeared, but we can tell you that the story will begin some 4 years after the conclusion of Transformers: Dark of the Moon. Most of the Autobots and Decepticons have disappeared from earth, while a group of scientists study the aliens in hopes of learning more about them, and the technology they have to offer, and how it can help mankind. Meanwhile, a Transformer from a bygone era reemerges with plans to take over the planet, and enslave mankind. This kicks off a new franchise trilogy that will bring the Autobots back to defend their human companions and help fight for justice and freedom.

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Here's what Michigan Film Board director Margaret O'Riley said about the franchise returning to Detroit.

"It speaks volumes about all Michigan has to offer that Transformers is returning once again to our state. This project will shine another bright spotlight on Michigan and provide tremendous opportunities for our cast, crew and support services."

2007's Transformers and 2011's Transformers: Dark of the Moon were both shot in Detroit. It isn't known how long the production will remain in Detroit, but the report from earlier this week revealed the Chicago shoot will start in June and run through October. The story, written by Ehren Kruger, will be set four years after the events in 2011's Transformers: Dark of the Moon. Mark Wahlberg, Nicola Peltz, and Jack Reynor are the only confirmed cast members at this point.