Joe and Nicky decide to go on a much needed vacation (could be to Malta, or wherever you want as long as it’s away from the rest of the team) and they are followed and targeted by bad guys who turn out to be super sadistic with no real ulterior motive. Basically the Norwegian film Funny Games or its American remake - they imprison joe and nicky in their vacation home and torture them in increasingly fucked up, humiliating ways - maybe a fuck of die scenario, or maybe they rape Nicky and force joe to watch - anything as long as there is a generous amount of Nicky whump please!

How it ends is up to you but a happy ending would be nice, maybe where the team find them or joe and Nicky manage to escape (unlike the film which quite literally has one of the bleakest endings out there).