Alide and Kosta are a couple since about a year.  For neither of them it's the first relationship, Alide even had something with a woman once.  They spend some time in a summerhouse, Mon Repos, next to a similar house called Mon Plaisir where 4 girls enjoy their vacation.  They are the witnesses of the first crack in the relationship between Alide and Kosta, when a man called Peps informs Kosta that Alide and he are in love with each other.  Alide doesn't deny, but Kosta is more than willing to believe that Peps is the one that will have to give up Alide.

But Alide can't give up Peps, and Kosta catches them both together.  Their relationship ends then and there.  But not in the mind of both of them, neither can forget the other.  Kosta tries to deal with the emptiness with an escape into an imaginary literary world mixed with alcohol, and he's slipping away when they meet again.  This time it's the other way round, and while she still lives with Peps they slowly try to recover from the wounds their breaking-up caused.

Eenzaam Avontuur is not the easiest novel to read.  The language is very poetic, which makes that many individual phrases have lots of beauty in them, but it doesn't do well to the pace of the story.  On the other hand, it does create a bit of a dreamy atmosphere which leaves more than enough time to explore the deapths and the shallownesses of how we humans interact, whether it is as lovers, rivals, or just aquaintances.  There were places I had to struggle through, there were places time flew without me noticing it.
Another reason the story requires some effort from the reader as well is the mixture between what happens, what seems to happen, and the storyline of the detective-novel Kosta is writing, a storyline that somewhat reflects Kosta's struggles.  In the end fiction and reality are not clearly separated, but isn't that how life really is?  When the four girls they met in the summerhouse see Alide and notice her unhappiness, each sees something different, and uses that knowledge for something different - so which truth is fiction and which hope is truth?

Blaman shows us a pretty gloomy view on humans and their relationships.  Passion and romantic love and emotional bonding cannot exist inside one relationship: Berthe (one of the girls, a lesbian) firmly believes she'll have to quench both desires in separate ways, Alide needs a separate man for each, once she loves but can't live with, one she despises but can't live without.  When Alide and Kosta come back together all they can think of is convince each other of their own reasons, of their own pain, but neither is willing to listen, neither is willing to forgive, at least not with words.

As I said, not the easiest novel to read, but a very poetic (be it a bit gloomy) story showing us a realistic story about the difficulties of existentially lonely people trying to live with each other and with themselves.