Among Thousands of Me

An ordinary employee named Liu Yang woke up one day and found that he was not in his own world. The mutual transmission of parallel time and space - he passed, and "him" from that world came. And that "he" may be a good guy or a bad guy. He would die in another world. Really will die. When you die once, you gain a soul. His sister's illness is counting down, and he is looking for an answer in the world. Among the thousands of me, which one is true?