Cal Piker hasn’t seen his sister Samantha since their mother’s funeral, so when he interrupts her English lecture one morning with a proposal - a week out in the woods of Oregon, looking for Bigfoot in the legendary 'Ape Canyon' - she is more than a little surprised. But it’s a dangerous thing to be led around by Cal, an irresponsible, frustratingly likable kid brother, enthusiastic to the point of irrationality to find Bigfoot for himself. For Cal, this is not a matter of legend. This is not just some adventure. If Samantha doesn’t stop him, Cal will either find Bigfoot or die trying.