When a hard-partying rockstar is kicked out of his band due to a drug addiction, he starts giving guitar lessons to fund his habit.

Furtherless & finally:

It seems to me that Implied -- but not explicit -- in your concept is the notion that when he begins to give guitar lessons to pay for his habit, he will be forced to engage with the human species in (for him) a radically new way. Heretofore, he's been exploiting people, selfishly reveling in superficial, transitory relationships with masses of people on stage and meaningless one-night stands with girls in bed.

Now as a teacher, rather than a performer, he must learn to give, to engage in deeper, long-haul, one-on-one relationships with his students. One of which should be meaningful, perchance, transformational.

There's a "B" story lurking somewhere in your idea, but I have no idea what you have in mind.

A logline is supposed to focus on the "A" story, of course, the struggle for an objective goal, but in doing so it can suggest the "B" story. Because the "B" story is usually the key to success (or failure) in the "A" story. And the potential for an interesting "B" story is what attracts me to your concept, keeps me coming back to post on it.

fwiw

Furtherless & finally:

It seems to me that Implied -- but not explicit -- in your concept is the notion that when he begins to give guitar lessons to pay for his habit, he will be forced to engage with the human species in (for him) a radically new way. Heretofore, he's been exploiting people, selfishly reveling in superficial, transitory relationships with masses of people on stage and meaningless one-night stands with girls in bed.

Now as a teacher, rather than a performer, he must learn to give, to engage in deeper, long-haul, one-on-one relationships with his students. One of which should be meaningful, perchance, transformational.

There's a "B" story lurking somewhere in your idea, but I have no idea what you have in mind.

A logline is supposed to focus on the "A" story, of course, the struggle for an objective goal, but in doing so it can suggest the "B" story. Because the "B" story is usually the key to success (or failure) in the "A" story. And the potential for an interesting "B" story is what attracts me to your concept, keeps me coming back to post on it.

fwiw

>>drug addiction does really affect job performance within the creative arts, even as a teacher.

Depends on the drug. Which was not revealed in the logline, hence, the question as to the credibility of the premise in that respect. But now that you've revealed that he's a heroin junkie, the question is moot. It's been well documented that as long as they can obtain their fix, it is possible for heroin addicts to maintain their careers.