They came to play, they stayed to die.
An elderly heiress is killed by her husband who wants control of her fortunes. What ensues is an all-out murder spree as relatives and friends attempt to reduce the inheritance playing field, complicated by some teenagers who decide to camp out in a dilapidated building on the estate.
- Release Date: September 8, 1971
- Runtime: 85 minutes
- Production countries: Italy
- Original Title: Ecologia del delitto
- Original Language: italiano (Italian)