"Old 37" is the last ambulance ride you'll ever take. In it, two brothers intercept 911 calls in an old ambulance to perform medical crimes upon their unlucky victims.

After losing her father and best friend in less than a year, wallflower Amy decides she won't watch life pass her by one more day. Taking cues from her flawlessly sexy neighbor Brooke, Amy attempts to flirt with her muscle car driving boyfriend, Jason. Ever the mean girl, Brooke vindictively takes it upon herself to remind Amy just how insignificant she is in this world. With the help of her nurse Mother, Amy goes under the knife. Now a dead ringer for Brooke, Amy makes her move for Jason.

Meanwhile, deep down the forgotten stretches of back road where the cool kids race their cars, two deranged brothers, Darryl and Jon Roy intercept 911 calls in their father's beat up old ambulance to exact medical atrocities on victims. When a careless car accident befalls Brooke and Jason, Amy gets caught in the fallout. Amy always wanted her neighbor's life, but she may get her neighbor's fate.