The puck drops on the Stanley Cup playoffs Tuesday night, with three first-round games on tap. For the fifth straight season, the Dallas Stars are on the outside looking in, but intrigue abounds nonetheless. Here’s a look at some compelling NHL postseason storylines:Dallas for BostonYes, the Dallas Stars will be home during the Stanley Cup playoffs this season, but Stars fans still have a postseason rooting interest. As a part of the trade with Boston that sent Jaromir Jagr to the Bruins, Dallas picked up a conditional 2013 second-round draft pick that turns into a first-round pick if the Bruins reach the Eastern Conference Finals. The further the Bruins go, the better the draft pick becomes for the Stars.Cup for MorrowIf Stars fans have it their way, the Bruins would face the Pittsburg Penguins in the Eastern Conference Finals. Through several trades the past four years, the Penguins hold many former Stars, including Jussi Jokinen, James Neal, Matt Niskanen and, most recently, former captain Brenden Morrow, who is in search of his first Stanley Cup. Also on the Pens is former Stars draft pick Jarome Iginla, who was traded to Calgary for Joe Nieuwendyk.Goalies winThe saying goes that the team with the hot goalie advances in the Stanley Cup playoffs. Well, the Chicago Blackhawks have two. Corey Crawford and Ray Emery finished in the top five in goals-against average, third and fourth, respectively. New York Rangers keeper Henrik Lundqvist tied for first in wins (24) with San Jose’s Antti Niemi and Minnesota’s Niklas Backstrom.Gr8nessWashington Capitals winger Alex Ovechkin seemed to fall out of all talks of greatness with a lackluster first-half performance. However, he has become one of the league’s hottest scorers in the final two months of the season, doubling his scoring with 39 goals. Washington faces the sixth-seeded New York Rangers in the first round of the playoffs.Detroit vs. AnaheimBoo and hiss all you want, Stars fans, while these are two teams Dallas loves to hate, they should make for an outstanding series. The Ducks coasted through the season as the second best team behind Chicago for the majority of the lockout-shortened four months. Detroit caught its second wind late in the season and pushed the Stars out of the playoffs en route to a No. 7 seed. Both teams are big and physical, which is the recipe for at least four games of big hits and gritty goals.