Well, in about 2 seconds of Google research, I found:
"The Sacred Heart diet is a soup-based diet, and claims that you will lose 10-17 pounds in the first week. This may be true, but most of the weight will tend to be water - and will be gained right back very soon after the diet.
This diet is very clearly an unsustainable fad diet, but is not as nutritionally unsound as similar diets. Most of these diets claim some magical fat-burning science is involved, or that there is something special about the combination of foods. This is
simply untrue - it is nothing more complex than a reduction in calories!"
That said, have fun and good luck
The above excerpt may be found online at http://www.everydiet.org/sacred_heart_diet.htm