The blasphemy against the Holy Ghost, which is defined below:
Book of Mormon, Alma 39:3-9
3 And this is not all, my son. Thou didst do that which was grievous unto me; for thou didst forsake the ministry, and did go over into the land of Siron among the borders of the Lamanites, after the harlot Isabel.
4 Yea, she did steal away the hearts of many; but this was no excuse for thee, my son. Thou shouldst have tended to the ministry wherewith thou wast entrusted.
5 Know ye not, my son, that these things [adulteries] are an abomination in the sight of the Lord; yea, most abominable above all sins save it be the shedding of innocent blood or denying the Holy Ghost?
6 For behold, if ye deny the Holy Ghost when it once has had place in you, and ye know that ye deny it, behold, this is a sin which is unpardonable; yea, and whosoever murdereth against the light and knowledge of God, it is not easy for him to obtain forgiveness; yea, I say unto you, my son, that it is not easy for him to obtain a forgiveness.
7 And now, my son, I would to God that ye had not been guilty of so great a crime. I would not dwell upon your crimes, to harrow up your soul, if it were not for your good.
8 But behold, ye cannot hide your crimes from God; and except ye repent they will stand as a testimony against you at the last day.
9 Now my son, I would that ye should repent and forsake your sins, and go no more after the lusts of your eyes, but cross yourself in all these things; for except ye do this ye can in nowise inherit the kingdom of God. Oh, remember, and take it upon you, and cross yourself in these things.
D&C 132:27 The blasphemy against the Holy Ghost, which shall not be forgiven in the world nor out of the world, is in that ye commit murder wherein ye shed innocent blood, and assent unto my death, after ye have received my new and everlasting covenant, saith the Lord God; and he that abideth not this law can in nowise enter into my glory, but shall be damned, saith the Lord.
Thanks for taking the time to answer my questions.
What about if someone reveals the Temple ceremonies? Is that a crime which the Blood of Christ will not remit and the person must pay the price with their own blood?