The discovery of an Egyptian princess’s tomb by British Museum researchers also reveals the mummy of her secret lover, "Imhotep," portrayed by Boris Karloff, along with a scroll containing words that can revive the deceased. Following the reading of this inscription within the burial chamber, the mummy is brought back to life and manages to escape, vowing to find and resurrect his princess as well. Ten years pass, and a young woman named "Helen," whose father works for the British administration, finds herself in Cairo; she bears an uncanny resemblance to the deceased princess, raising questions about whether she might be a reincarnation. “Imhotep” believes this to be the case, intending for her to become the vessel for his beloved’s reborn soul. What's notable is how openly he exists – there are no visible bandages or stiff movements; Karloff’s performance feels surprisingly human and particularly unsettling. I found his portrayal possessed a calculating menace that was very effective as the narrative progressed toward its ultimately sorrowful conclusion. The other actors, including Johann, who seemed somewhat detached, do their jobs adequately, establishing characters for the mummy to target, although there might be an excess of dialogue, perhaps stemming from a carryover from silent film practices. Despite this, it remains one of my preferred versions of this captivating and enigmatic tale.

Source on TMDB