Jack Rebney is the most famous man you've never heard of - an RV salesman whose hilarious, foul-mouthed outbursts circulated underground on VHS tapes in the 90s before turning into a full-blown Internet phenomenon in 2005. Today, the "Winnebago Man" has been seen by more than 20 million people worldwide, and is regarded as one of the first and funniest viral videos. Filmmaker Ben Steinbauer goes in search of Rebney - and finds him living alone on a mountain top, unaware of his fame. Winnebago Man is a laugh-out-loud look at viral culture and an unexpectedly poignant tale of one man's response to unintended celebrity.