Debora Cahn, a longtime writer and producer on ABC's Grey's Anatomy, has signed on to pen the screenplay for George Clooney's Coronado High.

Based on an Atavist article by Joshuah Bearman, the plot tells the true story of a hippie teacher and his students in the sleepy town of Coronado, California, who, in 1969, came up with the idea of smuggling marijuana in from Mexico by swimming and paddling surfboards. The notion turned into a criminal empire, which was eventually taken down by the DEA in the 1970s.

George Clooney is producing alongside his Smokehouse Pictures partner Grant Heslov and David Klawans. Joshuah Bearman wrote the Wired Magazine article that eventually became Best Picture winner Argo, which both George Clooney and Grant Heslov produced.

Debora Cahn got her start on the writing staff of The West Wing before moving on to Grey's Anatomy. She also landed on The Blacklist last year with her screenplay The Special Program, an adaptation of Barton Gellman's book Angler: The Cheney Vice Presidency. Debora Cahn also performed a production rewrite on HBO's Too Big to Fail.