Attractive game of transparencies and blurred (or out of focus). That same game of appearances produces uncertainty before what our eyes see, which is accentuated when contrasted with the title you have put: "Touch of water". I will dare to say another hypothesis different to the possible immersion of the leaf in water; I could see another leaf, but in a horizontal position, which visually cuts the tip of the vertical leaf; also a kind of stem (or leaf) which, also in a horizontal position, optically sections it further down. The white area at the top right could be the light of a lamp. This is an excellent photograph that would act according to the pictorial "trompe-l'œil". Greetings, @velimir.