As teenagers, Blandine and Magalie were inseparable. Years passed and they lost sight of each other. As their paths cross again, they decide to take the trip together that they have always dreamed of. Direction Greece, its sun, its islands but also its galleys because the two former best friends now have a very different approach to holidays... and to life!

Roxana Aubrey decides to drop her studies and escape her life in Paris for a free diving course in the south of France. She is quickly pulled into a life that reaches new depths brought by the weight of an ocean's descent.