Website redirect to another site containing malware

hy guys,my website is at http://www.ritmic-traumatic.com, and it has a problem recently, when i access it through search engine, any search engine, it will redirect to another site that giving false antivirus scan. at first i try to export my post and comments to another new wordpress blog, but it came to me again. Its fine this morning, but when i check it in the night, it redirects to another site again. I dont know what to do with it. is it in my template or plugin? i am a beginner in this whole thing, so please help me as if i am a 4th grade.

Thank you so much.