The movie's English title isn’t particularly helpful, as it spends a considerable amount of time exploring the disturbing mental landscape associated with “Mia” (Virginie Efira). She took refuge in a restaurant one evening during a storm and was then swept up in a terrorist attack. Though wounded, she lived through it—but has no recollection of what followed. Her husband, who is a doctor, now walks on eggshells, unsure how to assist her, and encourages her participation in support groups for those affected by the tragedy. To attempt to recover those lost memories, “Mia” undertakes a detailed effort to piece together that evening. She wants to know details like where people were seated, who was working, and if anyone can provide information about her actions or whereabouts. The facts she gathers seem contradictory, but thankfully “Thomas” (Benoît Magimel) is there to help her confront not only her present difficulties but also unresolved issues within their marriages. While it does drift somewhat into melodrama toward the conclusion, and a surprising amount of convenient coincidence appears as well, Virginie Efira’s performance creates a gripping experience for much of the film's duration. The close-up photography style is effective, working well with the sparse yet meaningful lines of dialogue, and for quite some time you feel her urgent desire to understand what happened.

Source on TMDB