Sisters is an intimate glimpse into a typical evening's melodrama at an American sorority house. With only a few hours until they are off to Ibiza for their Spring Break vacation, Cassandra, Jill and Jenna can't seem to pack their suitcases and stay under the airline weight limit; thirty-two pounds just isn't enough! When the girls suspect a mathematical failure in their conversion from kilos to pounds, a clever call placed by their sorority sister Courtney confirms the true number.