When Norman Graysmith is invited into the home of an aspiring serial killer, Aidan Mendle, he believes he has the subject for the documentary that will make his career.

A fly-on-the-wall documentary film crew follow Alex, a hopelessly romantic, rom-com obsessed virgin on a quest to find love. Alex quickly finds himself out of his depth when Lana, a Moldovan mail-order bride he met online makes the bold decision of moving to London to marry him.

Weeks away from his wedding, an insecure guy puts his fiancée through a series of tests to see if she would cheat before they tie the knot.