Ben Randall is a Coast Guard rescue swimmer. When his crew is killed in an accident and his marriage ends, his commander tells him he wants Randall to go to the US Coast Guard Rescue Swimmer "A" School to train other rescue swimmers. He encounters a guy named Jake who's a little cocky because he was once a swim champion. So Ben puts him through the wringer to see if he can handle it.
The Guardian
A high school swim champion with a troubled past enrolls in the U.S. Coast Guard's "A" School, where legendary rescue swimmer Ben Randall teaches him some hard lessons about loss, love, and self-sacrifice.