Scrat, the saber-toothed squirrel (a fictional animal from the Ice Age (franchise)), while trying to find a place to hide his acorn, digs up a buried time machine over an ice-encased skeletal body of a human time traveler. The machine activates, stating the date that Scrat is in (May 26, One Million B.C.) While sniffing around the machine, he accidentally presses a button on it, and the machine powers up and then zaps the acorn. Scrat gets mad and tries to beat up the time machine, but it zaps him too, sending him to the Middle Ages in 1250 AD, where he finds the acorn wedged under a rock. Scrat sees Excalibur, the sword in the stone, and decides to use it to move the rock and get back his acorn. He pulls out the sword but then finds himself under attack by a group of unseen Robin Hood archers, and uses the sword to block the arrows fired by the archers. He inadvertently frees the acorn in the process (and gets his tail wedged in the rock and having to yank it free) and takes it and the time machine and races off to find cover, only to hide in the barrel of a lit cannon. The cannon fires him into the path of hundreds of incoming arrows. The time machine zaps the acorn mid-flight and Scrat narrowly manages to activate the machine again for himself.