Ines has just received an ultimatum: If she loses one more customer, she will be fired from her job at the call centre. On the other end of the line is Alwin. A fortune cookie writer who suffers from writer's block after the death of his best friend, his dog Bonnie Barko, and therefore wants to cancel his phone contract.

A fleeting acquaintance can be exciting, adventurous, funny, but also opaque or even threatening. Shot in a single shot, "Between The Lines" explores the nuances of such a situation. Between the tracks of an underground station, the outlines of two people and their stories slowly emerge.