Cosmo gets in deeper when he witnesses a failed kidnap attempt of heiress Susan Fleming.

Bystander/witness Eustace Smith, who pronounces himself allergic to bullets and knives, attaches himself to Cosmo for protection.

To Chief Murphy's dismay, Fleming's family trusts Cosmo enough to let him handle the ransom drop.

After some confusion with lookalike briefcases, Cosmo ends up at the place where Susan is being held captive; sold out by her boyfriend for a cut of the ransom money.

Police rescue Susan in a shoot out with Eustace conquering his fears long enough to kayo several hoodlums with a mallet.