Charlie, portrayed by Anton Yelchin, is a wealthy young man whose frequent expulsion from school leads his mother (Hope Davis) to enroll him in a more conventional educational setting. He arrives in their older Mercedes, dressed smartly with a blazer and briefcase, quickly becoming the target of a tough student named Bivens (Tyler Hilton), but he’s rescued by the principal, Gardner (Robert Downey Jr.). Despite his privileged background, Charlie isn't naive; after some therapy sessions and discovering how beneficial certain medications can be, he strikes a deal with Bivens to offer counseling services to their classmates. Things progress from there as his growing understanding of their issues is used alongside his own doctor to obtain not only medication but also various treatments. Soon, he becomes incredibly popular, even gaining favor with Susan (Kat Dennings), whose father owns the school. However, things become complicated when Charlie begins talking with Kip (Mark Rendall), a student struggling with depression, leading everyone into precarious situations and forcing Charlie to re-evaluate what’s important. A fresh plan might offer him and his fellow students a more positive direction. Yelchin is undeniably charming in this role; someone who seems like he should be disliked ends up being quite likable. While he lacks a father figure and his mother appears somewhat detached, and money isn't an issue, you expect him to act spoiled, but there’s always the sense that he needs firmer guidance—and Downey Jr.’s character, with his own set of problems, seems capable of providing it. The script is genuinely enjoyable at times, and even when romantic feelings emerge, it avoids becoming overly sentimental, thanks to Yelchin's engagingly mischievous performance, which also incorporates a touch of genuine insight. It’s difficult to completely overhaul the typical teenage drama, but this one focuses more on the characters and delivers a solid story with less dependence on arena rock or power ballads. Downey Jr. performs adequately, and the supporting cast works well together to create something easily enjoyable and critical of the prevalent culture of prescription drug use.

Source on TMDB