On what initially appears to be a routine police raid, partners Andreas and Simon encounter low-life junkie Tristan. Knowing his history of domestic violence, Andreas is understandably unsettled to find Tristan living with another vulnerable woman. Fears worsen when he discovers their young baby locked away in a cupboard, crying and clearly neglected. A recent father himself, Andreas becomes fixated on safeguarding the child. It soon borders on obsession, dangerously blinding him to very real problems within his own family life.