French drama written and directed by Antonin Baudry. Chanteraide (François Civil) is a highly-skilled sonar expert tasked with classifying an unidentified presence off the coast of Syria. Meanwhile, Russia invades the Åland Islands of Finland, prompting France to respond. As tensions escalate, Chanteraide's attempts at identifying the mysterious submarine may provide the key to ensuring nuclear warfare is averted. The cast also features Omar Sy, Mathieu Kassovitz, Reda Kateb and Paula Beer.