You're at a party which took place on a cruise ship.

Your enemy's best friend was the house, so your enemy was there too.

You went upstairs to where everyone was and found your best friend. You chatted with her for a bit until she left to get a drink.

You stood in front of the pool. Suddenly, someone pushed you into the pool. You couldn't swim. You screamed before everyone's attention was on you.

Out of nowhere, your enemy jumped in the pool.