One Saturday morning a flooded kitchen leads best mates Ellen and Alexa into their attic.
But when Ben - Alexa's date from the night before - walks in, the handle breaks, and all are trapped.
While Ellen nurses her hangover, she watches her best friend fall for this gorgeous stranger.
Only to come to the horrifying realisation that she knows him from somewhere.
Frantically searching her memories, Ellen wonders: is Ben really who she thinks he is?
And more importantly, what on earth is she going to do about it . . . ?