For women (because it relies on you to have female parts): This is a hypno-fantasy with both S/M and Latex undertones. You apply for a job at the laboratory of an excentric scientist. He has a large greenhouse with special plants he wants you to help him with. You are lured very close to a beautiful, gigantic plant, that captures you and grows into you. You are drugged by the plant and pass out. When you come to, you find you are now part of the plant - you private parts being invaded by strong tendrils while your breasts are being milked. You are forced repeatedly to come, so the plant can milk you and feed on you. When the file ends, you are released.