Sophie Winston faces a real challenge: organizing her sister's wedding. Hannah is what in the United States is known as a Bridezilla, a perfectionist bride who is not going to let anything or anyone cloud the happiest day of her life: neither her groom, Craig Beacham, who nobody likes and is a real jerk, nor the succession of murders and incidents that begin to occur since a stranger appears hanged in the pergola installed in the garden for the occasion. Will the murderer be sitting on the bride or groom's side, or will he be standing at the altar? Sophie must solve the murder in time to prevent her sister from making the biggest (and perhaps the last) mistake of her life.