By Melissa Arnold

I never thought I’d cheer for a murderer. Nor did I ever imagine laughing so much at a show about murder. There’s a first time for everything, I guess.

Directed by Trey Compton with musical direction by James Olmstead, “A Gentleman’s Guide to Love and Murder” has a deceptively simple title, one that probably makes you think of a classic, suspenseful whodunit. What you get instead is a fast-paced, absurdly funny comedy that will keep you laughing from start to finish.

Based on the 1907 Roy Horniman novel “Israel Rank: The Autobiography of a Criminal,” the Tony Award-winning musical, with book by Robert L. Freedman and music by Steven Lutvak, ran on Broadway from 2013 to 2016.

Danney Gardner in a scene from the show. Photo by Michael DeCristofaro

As the show begins, we find ourselves looking in on a young man feverishly writing his memoirs from a London jail cell, seeking to preserve his story if he should face execution the next day. That man, Montague “Monty” Navarro, is the newly minted Earl of Highhurst, and his rise to nobility wasn’t exactly noble. Two years earlier, while grieving his mother’s death in 1907, an impoverished Monty learned that she was related to the powerful, aristocratic D’Ysquith family. The D’Ysquiths, however, disowned her when she chose to marry a commoner. Despite this, Monty was the ninth descendant in line to become the earl.

Monty hoped his newfound lineage would impress Sibella Hallward, the posh and sultry woman he loves, but she ultimately abandoned him to marry a wealthy man. With no one else to turn to, he attempted to make inroads with his new relatives, and in the process had a sinister thought: What if he killed the D’Ysquiths? What if he could become the earl? The show follows Monty through flashbacks of the past two years as he eliminates his cousins in a variety of zany and unexpected ways.

Wojcik/Seay Casting consistently assembles stellar casts for the Engeman’s shows, and this one is no exception, featuring a host of Broadway and national theater vets. Sean Yves Lessard plays Monty, and he is earnest, polished and entirely believable. You’ll empathize with his poverty and join him on an emotional roller coaster as he sneakily offs the D’Ysquiths. Beyond that, Lessard’s smooth, controlled vocals are a real treat, especially in the waltzing “Poison in My Pocket” and steamy “Sibella.”

What makes “Gentleman’s Guide” stand out is that eight of the D’Ysquith cousins are played by the same actor, Danny Gardner. He makes the transition from young to old, gay to straight and even male to female characters look entirely effortless. Each D’Ysquith has his or her unique quirks, and Gardner is so astoundingly versatile that you almost won’t believe it’s the same person. He also deserves accolades for impossibly fast costume changes and impressive tap dancing.

A torrid love triangle sits at the heart of Monty’s escapades. Despite her marriage to a wealthy man, Sibella (Kate Loprest) still comes knocking, especially as Monty ascends the line of succession. At the same time, Monty quickly finds himself falling for his distant cousin Phoebe D’Ysquith (Katherine McLaughlin), a good-hearted and pious lady that just wants to love and be loved.

Loprest makes the self-absorbed Sibella almost lovable with charming wit and confidence. She’s also a delight to listen to, a crystal clear soprano that’s strong without being overpowering. McLaughlin’s Phoebe is demure and sincere, a perfect foil to Sibella. She shines in songs like “Inside Out,” and the trio’s performance in “I’ve Decided to Marry You” is one of the show’s highlights.

Scene and props designer Nate Bertone deserves particular mention for his creative work on the detailed, Edwardian set of “Gentleman’s Guide.” To help audience members keep track of the D’Ysquiths, the stage is framed with massive portraits of Gardner in his various incarnations. Spotlights and laser X’s on those portraits will alert you to who’s still kicking and who’s been taken out. The effect is a lot of fun and adds to the show’s overall silliness.

The bottom line: “A Gentleman’s Guide to Love and Murder” is hilarious from the first line, and so enjoyable that I’d love to see it again. The show isn’t gory, but there’s plenty of innuendo to go around, and there are occasional loud noises and use of light fog throughout.

The John W. Engeman Theater, 250 Main St., Northport will present “A Gentleman’s Guide to Love and Murder” through April 28. Runtime is approximately 2 hours and 20 minutes with one 15-minute intermission. Tickets range from $73 to $78 with free valet parking. For more information or to order, call 631-261-2900 or visit www.engemantheater.com.