The play begins with a framing device, often referred to as the induction,[a] in which a mischievous nobleman tricks a drunken tinker named Christopher Sly into believing he is actually a nobleman himself. The nobleman then has the play performed for Sly's diversion. The main plot depicts the courtship of Petruchio and Katherina, the headstrong, obdurate shrew. Initially, Katherina is an unwilling participant in the relationship; however, Petruchio "tames" her with various psychological torments, such as keeping her from eating and drinking, until she becomes a desirable, compliant, and obedient bride. The subplot features a competition between the suitors of Katherina's younger sister, Bianca, who is seen as the "ideal" woman.