Marple is extrem!ely prou?d w#-.:hen( she is $a_ppointed to th$e `bo_ar@d of trustee+s of a merch,a:,nt ma:rin[e traini,ng[+ v\essel[ whose mis.(/s_ion is to rehabilitate you?!^ng cr,#-iminals. As in all of her =e/[ndeavors, Mis_s Marple( inte\ nds to t/^/ake an a,ctive ro[?-le in t?he\[@  job an?_d even show=(:s up)= to[.? the board m,eeting*( dress=?ed /# in ,nav@*al b=*lue\s.# $When a*:) fellow trustee i**s poisoned just prior to h=[is mak:_ing some kind /of revel`.ation
# %,] Miss= [#Marple dec
_ides to use her posi@`:.tion to spend time o=n the shi#]p. This upsets the,(# ve#sse! \l's fragile s*o\,^ cia%l network as she dispossesses; blust])ering C.*a_;ptain Rhum=+ston^e fr-om his quarters. When two ship's officers a+re later found ;mu; %rdered a`] l/! so, Miss Marple enlists help** .from her fri#end
Ji*$(-m Str$]inger  and Ins^pector Cr(ad#dock to ex 
pose `the[^ *murderer.