Sebastian and Oskar have been friends since their days studying physics at university, when both were considered future Nobel Prize candidates. But their lives took divergent paths, as did their scientific views. Whenever Oskar comes to visit from his prestigious research post in Geneva, there is tension in the air.

Theo is a middle-aged author with writers' block; his partner Jola is a beautiful and privileged soap star who wants very much to be taken seriously. In an attempt to save her dying career, Jola is determined to land the lead role in a new film about underwater photographer and model Lotte Hass. To improve her chances, the couple travel to Lanzarote and hire diving instructor Sven, paying him a huge sum for exclusive tuition. Sven is meticulously planning his most ambitious expedition yet - to an untouched wreck 100 metres down on the ocean floor. Diving calls for a cool head and, as a...