A young couple who have recently lost their child* become obsessed with cracking the secrets of a shortwave message code. The closer they get, the more bizarre events around them become, leading to everything going a bit tits-up by the end.
*Stop that shit now, you unimaginative screenwriter pisswand. The whole 'Their life was perfect on the outside, but the grief of their lost child was tearing them apart' thing is fucking tired.
Obviously it happens to some people in real life, I can't even begin to imagine the utter decimating emotional impact, but film after film after film has done this.
You want people to hear 'your voice'? Develop one first rather than flopping onto the matress of cliche.