Malloy and Reed investigate a series of safe jobs, which all seem to tie in with a retired safecracker who is taking care of his orphaned niece and nephew, and after a "tip" from him, finds the niece and nephew practicing his old tricks on another safe. The officers also investigate a woman whose baby was held hostage by her cousin and forcing her to meet and steal from other men, after which the officers arrest the cousin and rescue the baby.