Transformers: The Last Knight

In 484 AD, King Arthur teams up with the wise wizard Merlin. Together, they forge an alliance with the Knights of Iacon, a formidable group of Transformers hidden on Earth.

The Knights bestow upon Merlin an extraordinary alien staff, which becomes a key item in the battle against the Saxons. The Transformers transform into a colossal dragon to aid Arthur.

Fast forward to the present day, Transformers are branded as outlaws by governments worldwide. This leads to the formation of the Transformer Reaction Force (TRF) aimed at exterminating them.

A new Transformer craft crashes in the wreckage of Chicago. A group of children finds themselves in danger from a TRF Mecha but are rescued by Izabella and her Transformers.

During their escape, the brave Transformer Canopy is slain by the TRF, leaving a significant impact on his friends. He manages to attach a metallic talisman to Cade before dying.

In the far reaches of the Solar System, Optimus Prime discovers that Cybertron is disintegrating. He meets Quintessa, who claims to be his creator and manipulates him into becoming Nemesis Prime.

Quintessa reveals to Optimus that Earth is actually Unicron, an ancient foe of Cybertron, and plans to siphon Earth’s life force to restore his home world.

Growing horns appear at six locations globally, prompting NASA to deduce they signify an inter-galactic dimension that Cybertron will enter within three days.

William Lennox, a member of the TRF, brokers a deal with Megatron, releasing Decepticons to capture Cade. He discloses Cade's whereabouts, anticipating military intervention.

Cade and Viviane Wembly learn from Sir Edmund Burton that she is the last descendant of Merlin. Together, they must find Merlin's tomb to retrieve the staff necessary to save Earth.

The team, including Bumblebee and Cogman, ventures underwater to locate the Cybertronian Knights' sunken vessel. They discover Merlin's tomb and the powerful staff.

In a climactic confrontation, Bumblebee breaks Quintessa's control over Optimus. This leads to a fierce battle with Megatron and the Decepticons as the Knights rise again.

Megatron delivers the staff to Quintessa at Stonehenge, where they attempt to drain Unicron's life force. The Autobots arrive to confront them, leading to an epic battle.

Viviane manages to extract the staff, halting the destruction of Earth, but at the cost of Cybertron's destruction. Optimus calls for unity between humans and Transformers.

In a compelling mid-credits scene, scientists investigate a horn from Unicron found in the desert. Quintessa, disguised as a human, offers a method to eliminate Unicron.