  The recently discovered Indus stellar stream exhibits a diverse chemical
signature compared to what is found for most other streams due to the
abundances of two outlier stars, Indus$\_$0 and Indus$\_$13. Indus$\_$13,
exhibits an extreme enhancement in rapid neutron-capture ($r$-)process elements
with $\mathrm{[Eu/Fe]} = +1.81$. It thus provides direct evidence of the
accreted nature of $r$-process enhanced stars. In this paper we present a
detailed chemical analysis of the neutron-capture elements in Indus$\_$13,
revealing the star to be slightly actinide poor. The other outlier, Indus$\_0$,
displays a globular cluster-like signature with high N, Na, and Al abundances,
while the rest of the Indus stars show abundances compatible with a dwarf
galaxy origin. Hence, Indus$\_0$ provides the first chemical evidence of a
fully disrupted dwarf containing a globular cluster. We use the chemical
signature of the Indus stars to discuss the nature of the stream progenitor
which was likely a chemically evolved system, with a mass somewhere in the
range from Ursa Minor to Fornax.
