In a saucepan, mix the cajun seasoning and the water together to make a paste.
Pour in the heavy whipping cream and cook gently until the paste is well mixed in and the sauce is creamy and thick. Don't rush this, let the sauce get thick so that it will coat your tongue in spicy creamy goodness when you eat this.
Pour in your cooked or raw shrimp and let either heat through or cook through completely.