A married couple takes on a father-son duo; Nigerian siblings work together to beat two epidemiologists.

A father-and-daughter duo fights to beat a pair of childhood friends; twin brothers take on a couple of best friends; the winners from each round face off for a chance to win the grand prize of $250,000.

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Hosted by Janelle James, four teams of contestants compete in an epic battle against gravity and physics as they attempt to remove items from towering, themed stacks. In round one, a pair of best friends who are planning the girls' trip of their dreams tries to defeat two competitive brothers on the kids' room stack. In round two, a couple here to put their love to the test takes on a pair of musical theater classmates, who are used to performing under pressure, on the wedding stack. The winners from each round face off against the pirates' stack to earn a shot at The Mega Stack for a chance to win the grand prize of $250,000 on the season finale.