Immersion is imminent. A submarine quietly folds into the unfathomable depths of the ocean, disappearing without trace from the surface and taking with it a world whose space is enclosed in heat and wetness. The metallic ping of the sonar pulses in the glacial silence, and the smell of the diesel engines saturates the air. The heat is suffocating in the engine compartment, and the noise deafening. Everything on the TIEFENMESSER is about metal, pressure and precision: the piping, the riveted plates and the tubes. In the living quarters, time passes differently for the crew, except for the Captain: monitoring the periscope, he is the only one to have contact with the outside world.