  In this paper, we discuss the outcomes of the follow-up campaign of SN
2018ijp, discovered as part of the Zwicky Transient Facility survey for optical
transients. Its first spectrum shows similarities to broad-lined Type Ic
supernovae around maximum light, whereas later spectra display strong
signatures of interaction between rapidly expanding ejecta and a dense H-rich
circumstellar medium, coinciding with a second peak in the photometric
evolution of the transient. This evolution, along with the results of modeling
of the first light curve peak, suggests a scenario where a stripped star
exploded within a dense circumstellar medium. The two main phases in the
evolution of the transient could be interpreted as a first phase dominated by
radioactive decays, and an later interaction-dominated phase where the ejecta
collide with a pre-existing shell. We therefore discuss SN 2018jp within the
context of a massive star depleted of its outer layers exploding within a dense
H-rich circumstellar medium.
