Silent Land (1969) on Netflix

A perfect couple rents a holiday home on a sunny Italian island. The reality does not live up to their expectations when they find out that the pool in the house is broken. Ignorant of the fact that the island faces water shortage, they ask for someone to fix it. The constant presence of a stranger invades the couple's idea of safety and starts a chain of events, which makes them act instinctively and irrationally, heading to the darkest place in their relationship.

A young couple rents a holiday home on a sunny Italian island. What they find, however, does not meet their expectations. Turns out the garden pool is broken. Anna and Adam, despite the fact that the island is struggling with a lack of water, hire a worker to repair the pool for them. The constant presence of a stranger violates their sense of security and starts a chain of events that triggers irrational instincts in them and leads to the darkest point in their relationship.

—G