Maybe if I watched this again I would understand it, but the wooden acting and confusing plot didn't grab my interest enough to do that.
So the hero has an accident and is injected with some kind of drug that makes him prone to time travel. A cop's great grandfather is hung for his murder, since it appears that he vanished/was killed in the past. His brother's fiancé was killed in the accident. A guy in a disguise offers advice and vanishes, Another guy frames hero for the murder of the great grandfather. Another guy pulls him out of jail and informs him his life has been stolen in the present. and we are left like that. None of these pieces seem to fit together, or if they do, it's a Chinese puzzle. Brilliant minds may find it fascinating.