Alec travels back in time to prevent Emily's death. Kiera must follow to prevent Alec from altering history in a way that could end her chances of returning home forever. But Alec quickly sets in motion ripples that affect everyone around him - including this new timeline's already-resident Alec. Kiera arrives just in time to discover her Alec - now sporting a nasty scar. He's standing over another Kiera. A dead Kiera. Scar Alec has some explaining to do.
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