A Janitor suffering from aquaphobia discovers he has the ability to control water. He must conquer his fear to save his fiance from a malevolent man who wants to see the world burn.

The antagonist is someone who has the ability to control fire, this person killed his parents and made him an orphan.
The Protagonist nearly drowned when he was a child

I'll work more on the end of the logline some more, thanks all for the feedback.

While I love the idea of an "everyman superhero" with a phobia for his own power, I have to agree with holhuds - we kind of need a more specific villain. Otherwise, I quite like this one.

I think you start off with an interesting idea - a janitor with aquaphobia - but maybe you could push that a little further. Like what if he's a pool maintenance man who suddenly becomes aquaphobic? But then it gets too general: 'A malevolent man who wants to see the world burn' is too vague and could possibly be any psychopath. Can you narrow the idea down and give us more of a sense of the what the main action of the story is going to be? Good start, keep going with it!