Søren Vejby vil gerne vide, hvorfor han har så svært ved at slippe kokainen, og hvor stor risikoen for et tilbagefald egentlig er? Under et besøg hos nogle af landets førende hjerneforskere, testes han i en 'løgnedetektor', som fortæller, at hans nervesystem langt fra har lagt kokainen bag sig.
Søren møder en jævnaldrende mand, der ligesom ham selv troede, han var færdig med kokain - men så faldt han i igen med et brag! Herefter tager Søren til indre Vesterbro i København for at dokumentere, hvor nemt det er at få fat i stoffet på en helt almindelig fredag eftermiddag.
Søren Vejby wants to know why he finds it so difficult to get off the cocaine, and how big the risk of a relapse really is? During a visit to some of the country's leading brain researchers, he is tested in a 'lie detector', which reveals that his nervous system has far from put the cocaine behind it. Søren meets a man of the same age who, like himself, thought he was done with cocaine - but then he fell back into it with a bang! After this, Søren goes to inner Vesterbro in Copenhagen to document how easy it is to get hold of the material on an ordinary Friday afternoon.
