What is the explanation of the first line of the function secret?

Question

What is the meaning of the first line in the function secret? What is the output of return secret(3,argv)?

#include <stdio.h>
int secret(int argc, char **argv)
{
 *argv && secret(0, argv + 1) &&
 argc == 0 && printf("%s\n", *argv);
 return argc == 0;
}
int main()
{
 char *argv[] = {"hello", "XYZ", "123", "ABC", NULL};

 return (secret(3,argv));
}