Martin's levitation finger is getting uncontrollable due to overexposure to the sun. A Martian sedative will temporarily control the symptom, but Martin needs a longer term solution. But before Martin's finger is put to sleep, it causes some flying objects in Mrs. Brown's apartment, which brings in the services of psychic phenomenon expert Prof. Clemmens. Martin needs to hide his spaceship from the professor while keeping his problem finger under control. Worse, the temporary fix if weakened before a permanent fix, will cause major catastrophe due to the build up of energy. Although Martin accidentally stumbles onto the permanent fix, he still needs to settle Mrs. Brown's fear about her house and provide the professor with an explanation for the weird goings-on.
—Huggo