Here's the official description from AMC: "The all-new Better Call Saul: Client Development online comic follows Mike Ehrmantraut and Saul Goodman as they work to root out the truth about Saul’s newest client, revealing exactly what took place between when Jimmy In-N-Out gets arrested as Heisenberg and the moment Saul confronts Walter White in his chemistry classroom. As a bonus, the Better Call Saul comic also includes an exclusive two-page short that reimagines Saul as a superhero, rescuing a client from the clutches of evil police officers."
You can check the comic out here. Jenn Carroll and Gordon Smith wrote it, along with art by The Only Living Boy's Steve Ellis.
Better Call Saul debuts on Sunday at 10 p.m. ET/PT following the midseason premiere of The Walking Dead.