Six friends reunite in London to celebrate the life of their recently deceased ex-employer, a professor that brought them together in 1999 to help build a dating website based on psychological testing. But what is meant to be a night of bittersweet nostalgia soon becomes a twisted and deadly game. The old friends are given an ultimatum: reveal their darkest secrets to the group or pick each other off one-by-one. It soon becomes clear that their current predicament is related to their shared past. The love questionnaire they helped develop in 1999 for the dating site was also turned into a tool for weeding out psychopaths: The Wasp Trap. This experiment and the other tragic events of that summer long ago may help reveal the truth behind a killer hiding in plain sight.

When British twenty-somethings Ruth and Adam are offered the chance to spend the summer housesitting in New York, they can’t say no. Young, in love and on the cusp of professional success, they feel as if luck is finally on their side. So the moment that Eden turns up on the doorstep, drenched from a summer storm, it seems only right to share a bit of that good fortune. Beautiful and charismatic, Eden claims to be a friend of the homeowners, who told her she could stay whenever she was in New York. They know you’re not supposed to talk to strangers --- let alone invite them into your home --- but after all, Eden is only a stranger until they get to know her. As suspicions creep in that Eden may not be who she claims to be, they begin to wonder if they’ve made a terrible mistake.