Don't understand pattern
I am making a pattern for a remote caddy and have gotten to a place where I'm not sure what it is telling me to do. The pattern states: Ch 3; * dc in next 27 dc, ch 1, dc in next 31 dc, ch 1, dc in next 27 dc; join with a sl st to first dc: 86 dc. Pull up a lp and drop after last rnd.
I am not sure what it means by 'pull up a lp and drop after last rnd.' Can anyone assist me please?