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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def decrypt(self):
 """Decrypt decrypts the secret and returns the plaintext. Calling decrypt() may incur side effects such as a call to a remote service for decryption. """

        if not self._crypter:
            return b''
        try:
            plaintext = self._crypter.decrypt(self._ciphertext, **self._decrypt_params)
            return plaintext
        except Exception as e:
            exc_info = sys.exc_info()
            six.reraise(
                ValueError('Invalid ciphertext "%s", error: %s' % (self._ciphertext, e)),
                None,
                exc_info[2]
            )