Secret agent Harry Hannan experiences a psychological crisis after a failed mission in Mexico leads to his wife's tragic death. Following a stay in a mental institution, he resumes his career but soon finds himself questioning his sanity when he receives a strange death threat in Hebrew. Unsure of who among his associates poses a danger, Hannan joins forces with Ellie Fabian, a charming college student, to decipher the ominous message and uncover the truth behind the threat that looms over him.