The fifth Transformers movies has four writers, including Oscar winning hack Akiva Goldsman and has six people who edited it and it is still a bloated mess.
The film starts off in legendary Arthurian times as twelve Transformers hidden on Earth give drunk Merlin an alien staff, they combine into a dragon to help King Arthur beat the Saxons. Merlin is later warned that an evil entity will come for the staff.
In present day Earth, Transformers are declared outlaws by all governments of the world and a special unit is created kill them but still more alien robots arrive.
Somewhere along the line Cade Yeager (Mark Wahlberg) comes in possession of an ancient Transformers talisman and then bought over to the UK by Sir Edmund Burton (Anthony Hopkins) where he is introduced to an Oxford professor, Viviane Wembly the last living descendant of Merlin. She must find and use Merlin's staff to prevent the planet being destroyed by Cybertron.
The film has state of the art special effects and it has plenty of Michael Bay's trademarked directorial flourishes. It is also overlong, stupidly plotted and incoherent.