1000…2000...3000 metres? How far down can these people go underground? We are living in an extraordinary period in this field, similar, within proportion to that of space expedition to the moon or other planets…Every year the equipment is more sophisticated and the men more specialised and the conquest increasingly impressive. Having reached the maximum level in this exacting sport, Oliver Isler, proposes to beat his own record using a completly new philosophy. Having devoted a quarter of a century to this passion, backed by unparalleled experience and equipped with the best material in the world, Oliver is ready at last to make the longest descent in a syphon. Apart from the scientific discoveries, the work in favour of regional communities or the mere sports success, this documentary is an invitation to a real and proper interior journey.