When nineteen year old blonde student Betty is caught looking at girlie pornography in the library of her prestigious private university the institution's strict principal, Professor Briargrove, summons her beautiful svelte assistant, Harriett, to administer a whipping the wretched young girl will never forget! Yet what starts as an austere punishment thrashing soon turns into a deeply erotic encounter for the both of them as it emerges Harriett is concealing certain lesbian desires of her own!