The rising star set an impressive provisionally fastest time of 34:39.99 over the 30km course and sat in the hot seat until the very last rider rode a faster time to claim gold.
Although Plapp was slightly disappointed with missing out on the gold medal, he still mentioned that he "loved the fight" and was "really happy with the execution of his [my] ride."
Plapp's silver medal was made even more impressive considering he had to pull out of the I'Avenir in France when he crashed in opening stage and sustained an elbow fracture in August.
The injury restricted him to only indoor cycling for the weeks leading into the world championships.
Recently Plapp had also competed at the Tokyo Olympics as a member of the men's team pursuit team.
Initially selected as the emergency, Plapp was given an opportunity to come into the line-up when his teammate Alex Porter crashed onto the track at a high speed during the qualifying stage.
The team bounced back and won an inspiring bronze medal.