What happens when your new best friend is your husband's mistress? Madelyn Reid accidentally learns of her husband's infidelity when she saves his sexy young mistress Lucy from a bungled suicide attempt. When her unsuspecting young rival suggests the two new friends take each other's advice - on everything - Madelyn sees an opportunity to seize the upper hand. But the plan backfires when Lucy, an aspiring actress, insists Madelyn keep her end of the bargain and orders her to star as King Lear in a community production, with Lucy playing The Fool. Things really get out of control when Lucy starts giving Madelyn instructions on dealing with an amorous coworker and a handsome stranger. if i were you is a very entertaining look at the unexpected places that life can take us.