The sonar expert of the submarine, Chanteraide – nicknamed "Socks", and serving as "golden ear", the officer specialized in underwater acoustics – first classifies the contact as a wounded whale, but it quickly turns out that the contact is an unknown submarine transmitting their position to an Iranian frigate and a maritime helicopter operating in the area.

Chanteraide, trying to identify the unknown contact in Syria, hacks into his superior officer's computer and after conducting research at a bookstore where he starts a romantic relationship with Diane, as well as the naval archives, discovers that it is in fact a Russian Timour III ballistic missile submarine, supposedly dismantled.

Chanteraide distresses at the now empty dock but after an air raid siren sounds, runs into the bunker where the naval staff have relocated.

The Secretary of State reveals critical intelligence that the terrorist organisation Al-Jadida had illegally bought the decommissioned Timour III submarine from a corrupt admiral and launched an empty missile at France, tricking the French into an irrevocable procedure to launch a nuclear counterstrike from the Formidable.

Grandchamp prepares to fire the nuclear missile, following procedure and eliminating all outside communication while keeping the submarine in stealth mode.

After D'Orsi is rebuffed in his efforts to communicate with Grandchamp via underwater telephone, he attempts to approach Formidable by swimming to it in person.

Chanteraide recalls Grandchamp's prior trust in him, and begs him not to fire the missile, before saying goodbye in the face of his impending death on the stricken Titan.

The Wolf's Call was inspired by director Antonin Baudry's real life experiences as a diplomat, advisor and speechwriter for France's former Foreign Minister, Dominique de Villepin.

I therefore decided to only draw inspiration from what I saw and felt – even though there are submarine films I love, such as Das Boot and The Hunt for Red October.

[9] Filming took place in Toulon,[10] then in the Giens Peninsula and the Levant Island, at the DGA Essais de missiles in the Var department in Brest,[11] and in Paris.

[13] The reviewer Anthony Kao from Cinema Escapist states that the film's military sequences depict a "more muscular France" with "French hard power" acting as part of a "more militarily assertive Europe", noting that these political storylines are influenced by director Antonin Baudry having "previously served as a high-ranking French diplomat."

The site's critical consensus reads, "The Wolf's Call is a classic submarine action-thriller that will keep you on the edge of your seat.