Transformers Mobile Movie

Archibald Witwicky (the ancestor of the Witwicky family) fell into the abyss with a huge chunk of ice in a disaster, landing on a robot's hand buried under the ice layer. When the captain woke up, he found that the robot was staring at him. This robot is none other than Megatron, who left Cybertron long ago to go to Earth to look for the Allspark...