Ingmar Bergman's The Serpent's Egg follows a week in the life of Abel Rosenberg, an out-of-work American circus acrobat living in poverty-stricken Berlin following Germany's defeat in World War I       When his brother commits suicide, Abel seeks refuge in the apartment of an old acquaintance Professor Veregus       Desperate to make ends meet in the war-ravaged city, Abel takes a job in Veregus' clinic, where he discovers the horrific truth behind the work of the strangely beneficent professor and unlocks the chilling mystery that drove his brother to kill himself