Steve takes on the identity of a longshoreman when an agent, who is about to expose the ring smuggling super sensitive detecting devices, disappears. His bionic arm has been modified to send a blue flash to his bionic eye when his hand passes near the devices. Steve takes lodging at Mrs. Cook's boarding house, where the agent was last seen. Mrs. Cook's young son, Ernest, turns to Steve for help when his mother also disappears. In the interim, Ernest's smashed bike is repaired by the bionic man--which results in a rash of broken toys arriving on the boarding house steps.