Sam is planning to tie the knot with Hailie, his longtime girlfriend, a girl who looks remarkably familiar shows up. Sam exhausts his mind to find traces of this girl, but nothing could be recalled even with the help of CERA - the external database of life memories. Coincidentally, Sam finds evidence of the past this girl and he shared, and in this version of universe, Hailie was only a tag along friend. We live by our memories, but does that mean when the memories are erased, we could also get rid of the happenings that have struck our souls?