Captain Nick Angel has finally made a separate peace with the war in Afghanistan. Since having been ordered to bomb a Tajik village which resulted in the death of a little boy of no more than two, he's been suffering from temporary bouts of blindness. Knowing the he needs time to rest and recover from his post traumatic stress, the US Army decides to send him to Venice along with his fiancee, the artist, Grace Blunt. Together they try and recapture their former life together. But when Grace suddenly goes missing, Nick not only finds himself suddenly alone and sightless in the ancient city of water, but also the number one suspect in her disappearance.