You Do Need power plug adapter while traveling from British Virgin Islands to North Korea.

Here is Why You Need An Adapter

The outlet and plug type used in North Korea is C and in British Virgin Islands are A and B. This is how they look like.

British Virgin Islands

In British Virgin Islands, outlets of type A and B are in use.

Type A

Type B

North Korea

In North Korea, outlets of type C are in use.

Type C