Is the story about Jesus in the bible just a serious case of plagiarism. Yes is the answer if you acknowledge the fact that the story of Horus came first; and that it did.
"Stories from the life of Horus had been circulating for centuries before Jesus birth (circa 4 to 7 BCE). If any copying occurred by the writers of the Egyptian or Christian religions, it was the followers of Jesus who incorporated into his biography the myths and legends of Horus, not vice-versa."
It's quite shocking read actually. I don't believe in the Bible or the character they call Jesus but if I did and studied the story of Horus I'd right now feel pretty damn pranked.